diff --git a/app/src/main/res/drawable-hdpi/ic_warning_white_24dp_img.png b/app/src/main/res/drawable-hdpi/ic_warning_white_24dp_img.png
deleted file mode 100644
index 55c68431b..000000000
Binary files a/app/src/main/res/drawable-hdpi/ic_warning_white_24dp_img.png and /dev/null differ
diff --git a/app/src/main/res/drawable-hdpi/reader_background_checkbox_selected.png b/app/src/main/res/drawable-hdpi/reader_background_checkbox_selected.png
deleted file mode 100644
index 9908433c0..000000000
Binary files a/app/src/main/res/drawable-hdpi/reader_background_checkbox_selected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-hdpi/reader_background_checkbox_unselected.png b/app/src/main/res/drawable-hdpi/reader_background_checkbox_unselected.png
deleted file mode 100644
index 195e875fb..000000000
Binary files a/app/src/main/res/drawable-hdpi/reader_background_checkbox_unselected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-ldpi/reader_background_checkbox_selected.png b/app/src/main/res/drawable-ldpi/reader_background_checkbox_selected.png
deleted file mode 100644
index d06d87c95..000000000
Binary files a/app/src/main/res/drawable-ldpi/reader_background_checkbox_selected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-ldpi/reader_background_checkbox_unselected.png b/app/src/main/res/drawable-ldpi/reader_background_checkbox_unselected.png
deleted file mode 100644
index 4899a16ff..000000000
Binary files a/app/src/main/res/drawable-ldpi/reader_background_checkbox_unselected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/ic_warning_white_24dp_img.png b/app/src/main/res/drawable-mdpi/ic_warning_white_24dp_img.png
deleted file mode 100644
index 04365b98a..000000000
Binary files a/app/src/main/res/drawable-mdpi/ic_warning_white_24dp_img.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/reader_background_checkbox_selected.png b/app/src/main/res/drawable-mdpi/reader_background_checkbox_selected.png
deleted file mode 100644
index f0faf295f..000000000
Binary files a/app/src/main/res/drawable-mdpi/reader_background_checkbox_selected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/reader_background_checkbox_unselected.png b/app/src/main/res/drawable-mdpi/reader_background_checkbox_unselected.png
deleted file mode 100644
index 69e1ee734..000000000
Binary files a/app/src/main/res/drawable-mdpi/reader_background_checkbox_unselected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_warning_white_24dp_img.png b/app/src/main/res/drawable-xhdpi/ic_warning_white_24dp_img.png
deleted file mode 100644
index a43fa3c27..000000000
Binary files a/app/src/main/res/drawable-xhdpi/ic_warning_white_24dp_img.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_warning_white_24dp_img.png b/app/src/main/res/drawable-xxhdpi/ic_warning_white_24dp_img.png
deleted file mode 100644
index 807b9fa18..000000000
Binary files a/app/src/main/res/drawable-xxhdpi/ic_warning_white_24dp_img.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxhdpi/reader_background_checkbox_selected.png b/app/src/main/res/drawable-xxhdpi/reader_background_checkbox_selected.png
deleted file mode 100644
index 287892b71..000000000
Binary files a/app/src/main/res/drawable-xxhdpi/reader_background_checkbox_selected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxhdpi/reader_background_checkbox_unselected.png b/app/src/main/res/drawable-xxhdpi/reader_background_checkbox_unselected.png
deleted file mode 100644
index b279adbbd..000000000
Binary files a/app/src/main/res/drawable-xxhdpi/reader_background_checkbox_unselected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_warning_white_24dp_img.png b/app/src/main/res/drawable-xxxhdpi/ic_warning_white_24dp_img.png
deleted file mode 100644
index 8683a2ea9..000000000
Binary files a/app/src/main/res/drawable-xxxhdpi/ic_warning_white_24dp_img.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxxhdpi/reader_background_checkbox_selected.png b/app/src/main/res/drawable-xxxhdpi/reader_background_checkbox_selected.png
deleted file mode 100644
index 90c1bd6f5..000000000
Binary files a/app/src/main/res/drawable-xxxhdpi/reader_background_checkbox_selected.png and /dev/null differ
diff --git a/app/src/main/res/drawable-xxxhdpi/reader_background_checkbox_unselected.png b/app/src/main/res/drawable-xxxhdpi/reader_background_checkbox_unselected.png
deleted file mode 100644
index 5a3af58d6..000000000
Binary files a/app/src/main/res/drawable-xxxhdpi/reader_background_checkbox_unselected.png and /dev/null differ
diff --git a/app/src/main/res/drawable/ic_clear_black_24dp.xml b/app/src/main/res/drawable/ic_clear_black_24dp.xml
deleted file mode 100644
index ede4b7108..000000000
--- a/app/src/main/res/drawable/ic_clear_black_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FF000000"
-        android:pathData="M19,6.41L17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_crop_original_white_24dp.xml b/app/src/main/res/drawable/ic_crop_original_white_24dp.xml
deleted file mode 100644
index 6e130c7b3..000000000
--- a/app/src/main/res/drawable/ic_crop_original_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M19,3L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,5c0,-1.1 -0.9,-2 -2,-2zM19,19L5,19L5,5h14v14zM13.96,12.29l-2.75,3.54 -1.96,-2.36L6.5,17h11l-3.54,-4.71z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_expand_less_white_36dp.xml b/app/src/main/res/drawable/ic_expand_less_white_36dp.xml
deleted file mode 100644
index c092cc2ca..000000000
--- a/app/src/main/res/drawable/ic_expand_less_white_36dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="36dp"
-        android:height="36dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M12,8l-6,6 1.41,1.41L12,10.83l4.59,4.58L18,14z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_expand_more_white_36dp.xml b/app/src/main/res/drawable/ic_expand_more_white_36dp.xml
deleted file mode 100644
index 5f60a424e..000000000
--- a/app/src/main/res/drawable/ic_expand_more_white_36dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="36dp"
-        android:height="36dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M16.59,8.59L12,13.17 7.41,8.59 6,10l6,6 6,-6z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_explore_blue_24dp.xml b/app/src/main/res/drawable/ic_explore_blue_24dp.xml
deleted file mode 100644
index 51ea4b5ff..000000000
--- a/app/src/main/res/drawable/ic_explore_blue_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FF54759e"
-        android:pathData="M12,10.9c-0.61,0 -1.1,0.49 -1.1,1.1s0.49,1.1 1.1,1.1c0.61,0 1.1,-0.49 1.1,-1.1s-0.49,-1.1 -1.1,-1.1zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM14.19,14.19L6,18l3.81,-8.19L18,6l-3.81,8.19z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_home_white_24dp.xml b/app/src/main/res/drawable/ic_home_white_24dp.xml
deleted file mode 100644
index fafc05e0c..000000000
--- a/app/src/main/res/drawable/ic_home_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#ffffff"
-        android:pathData="M10,20v-6h4v6h5v-8h3L12,3 2,12h3v8z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_more_vert_white_24dp.xml b/app/src/main/res/drawable/ic_more_vert_white_24dp.xml
deleted file mode 100644
index 3dfd99efc..000000000
--- a/app/src/main/res/drawable/ic_more_vert_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M12,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,10c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM12,16c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_play_arrow_white_36dp.xml b/app/src/main/res/drawable/ic_play_arrow_white_36dp.xml
deleted file mode 100644
index 5686df3ab..000000000
--- a/app/src/main/res/drawable/ic_play_arrow_white_36dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="36dp"
-        android:height="36dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M8,5v14l11,-7z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_screen_lock_landscape_white_24dp.xml b/app/src/main/res/drawable/ic_screen_lock_landscape_white_24dp.xml
deleted file mode 100644
index 79fae1854..000000000
--- a/app/src/main/res/drawable/ic_screen_lock_landscape_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M21,5L3,5c-1.1,0 -2,0.9 -2,2v10c0,1.1 0.9,2 2,2h18c1.1,0 2,-0.9 2,-2L23,7c0,-1.1 -0.9,-2 -2,-2zM19,17L5,17L5,7h14v10zM10,16h4c0.55,0 1,-0.45 1,-1v-3c0,-0.55 -0.45,-1 -1,-1v-1c0,-1.11 -0.9,-2 -2,-2 -1.11,0 -2,0.9 -2,2v1c-0.55,0 -1,0.45 -1,1v3c0,0.55 0.45,1 1,1zM10.8,10c0,-0.66 0.54,-1.2 1.2,-1.2 0.66,0 1.2,0.54 1.2,1.2v1h-2.4v-1z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_screen_lock_portrait_white_24dp.xml b/app/src/main/res/drawable/ic_screen_lock_portrait_white_24dp.xml
deleted file mode 100644
index 774b9764b..000000000
--- a/app/src/main/res/drawable/ic_screen_lock_portrait_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M10,16h4c0.55,0 1,-0.45 1,-1v-3c0,-0.55 -0.45,-1 -1,-1v-1c0,-1.11 -0.9,-2 -2,-2 -1.11,0 -2,0.9 -2,2v1c-0.55,0 -1,0.45 -1,1v3c0,0.55 0.45,1 1,1zM10.8,10c0,-0.66 0.54,-1.2 1.2,-1.2 0.66,0 1.2,0.54 1.2,1.2v1h-2.4v-1zM17,1L7,1c-1.1,0 -2,0.9 -2,2v18c0,1.1 0.9,2 2,2h10c1.1,0 2,-0.9 2,-2L19,3c0,-1.1 -0.9,-2 -2,-2zM17,19L7,19L7,5h10v14z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_screen_rotation_white_24dp.xml b/app/src/main/res/drawable/ic_screen_rotation_white_24dp.xml
deleted file mode 100644
index 617691b39..000000000
--- a/app/src/main/res/drawable/ic_screen_rotation_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M16.48,2.52c3.27,1.55 5.61,4.72 5.97,8.48h1.5C23.44,4.84 18.29,0 12,0l-0.66,0.03 3.81,3.81 1.33,-1.32zM10.23,1.75c-0.59,-0.59 -1.54,-0.59 -2.12,0L1.75,8.11c-0.59,0.59 -0.59,1.54 0,2.12l12.02,12.02c0.59,0.59 1.54,0.59 2.12,0l6.36,-6.36c0.59,-0.59 0.59,-1.54 0,-2.12L10.23,1.75zM14.83,21.19L2.81,9.17l6.36,-6.36 12.02,12.02 -6.36,6.36zM7.52,21.48C4.25,19.94 1.91,16.76 1.55,13L0.05,13C0.56,19.16 5.71,24 12,24l0.66,-0.03 -3.81,-3.81 -1.33,1.32z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_view_carousel_white_24dp.xml b/app/src/main/res/drawable/ic_view_carousel_white_24dp.xml
deleted file mode 100644
index c5d900821..000000000
--- a/app/src/main/res/drawable/ic_view_carousel_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M7,19h10L17,4L7,4v15zM2,17h4L6,6L2,6v11zM18,6v11h4L22,6h-4z"/>
-</vector>
diff --git a/app/src/main/res/drawable/ic_zoom_out_map_white_24dp.xml b/app/src/main/res/drawable/ic_zoom_out_map_white_24dp.xml
deleted file mode 100644
index 078577510..000000000
--- a/app/src/main/res/drawable/ic_zoom_out_map_white_24dp.xml
+++ /dev/null
@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#FFFFFFFF"
-        android:pathData="M15,3l2.3,2.3 -2.89,2.87 1.42,1.42L18.7,6.7 21,9L21,3zM3,9l2.3,-2.3 2.87,2.89 1.42,-1.42L6.7,5.3 9,3L3,3zM9,21l-2.3,-2.3 2.89,-2.87 -1.42,-1.42L5.3,17.3 3,15v6zM21,15l-2.3,2.3 -2.87,-2.89 -1.42,1.42 2.89,2.87L15,21h6z"/>
-</vector>
diff --git a/app/src/main/res/drawable/reader_background_checkbox.xml b/app/src/main/res/drawable/reader_background_checkbox.xml
deleted file mode 100644
index 2ace26fce..000000000
--- a/app/src/main/res/drawable/reader_background_checkbox.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:state_checked="true" android:drawable="@drawable/reader_background_checkbox_selected" />
-    <item android:drawable="@drawable/reader_background_checkbox_unselected" />
-</selector>
\ No newline at end of file