Code cleanup

Release v6.6.0
Cleanup changelog

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutController.kt

@@ -1,8 +1,6 @@
 package eu.kanade.tachiyomi.ui.setting
 
 import android.app.Dialog
-import android.content.Intent
-import android.net.Uri
 import android.os.Bundle
 import android.support.v7.preference.PreferenceScreen
 import android.view.View
@@ -43,12 +41,6 @@ class SettingsAboutController : SettingsController() {
     override fun setupPreferenceScreen(screen: PreferenceScreen) = with(screen) {
         titleRes = R.string.pref_category_about
 
-        switchPreference {
-            key = "acra.enable"
-            titleRes = R.string.pref_enable_acra
-            summaryRes = R.string.pref_acra_summary
-            defaultValue = true
-        }
         switchPreference {
             key = Keys.automaticUpdates
             titleRes = R.string.pref_enable_automatic_updates
@@ -69,15 +61,6 @@ class SettingsAboutController : SettingsController() {
                 isVisible = false
             }
         }
-        preference {
-            title = "Discord"
-            val url = "https://discord.gg/2dDQBv2"
-            summary = url
-            onClick {
-                val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
-                startActivity(intent)
-            }
-        }
         preference {
             titleRes = R.string.version
             summary = if (BuildConfig.DEBUG)