Remove legacy settings sheet

The per-series settings aren't quite functional yet, but they're also
accessible outside of the sheet.

app/src/main/java/eu/kanade/tachiyomi/widget/MaterialSpinnerView.kt

@@ -1,117 +0,0 @@
-package eu.kanade.tachiyomi.widget
-
-import android.annotation.SuppressLint
-import android.content.Context
-import android.util.AttributeSet
-import android.view.Gravity
-import android.view.LayoutInflater
-import android.view.MenuItem
-import android.widget.FrameLayout
-import androidx.appcompat.content.res.AppCompatResources
-import androidx.appcompat.view.menu.MenuBuilder
-import androidx.appcompat.widget.PopupMenu
-import androidx.core.content.withStyledAttributes
-import androidx.core.view.forEach
-import androidx.core.view.get
-import androidx.core.view.size
-import eu.kanade.tachiyomi.R
-import eu.kanade.tachiyomi.databinding.PrefSpinnerBinding
-import eu.kanade.tachiyomi.util.system.getResourceColor
-import tachiyomi.core.preference.Preference
-
-class MaterialSpinnerView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
-    FrameLayout(context, attrs) {
-
-    private var entries = emptyList<String>()
-    private var selectedPosition = 0
-    private var popup: PopupMenu? = null
-
-    var onItemSelectedListener: ((Int) -> Unit)? = null
-        set(value) {
-            field = value
-            if (value != null) {
-                popup = makeSettingsPopup()
-                setOnTouchListener(popup?.dragToOpenListener)
-                setOnClickListener {
-                    popup?.show()
-                }
-            }
-        }
-
-    private val emptyIcon by lazy {
-        AppCompatResources.getDrawable(context, R.drawable.ic_blank_24dp)
-    }
-    private val checkmarkIcon by lazy {
-        AppCompatResources.getDrawable(context, R.drawable.ic_check_24dp)?.mutate()?.apply {
-            setTint(context.getResourceColor(android.R.attr.textColorPrimary))
-        }
-    }
-
-    private val binding = PrefSpinnerBinding.inflate(LayoutInflater.from(context), this, false)
-
-    init {
-        addView(binding.root)
-
-        context.withStyledAttributes(set = attrs, attrs = R.styleable.MaterialSpinnerView) {
-            val title = getString(R.styleable.MaterialSpinnerView_title).orEmpty()
-            binding.title.text = title
-
-            val viewEntries = getTextArray(R.styleable.MaterialSpinnerView_android_entries)
-                .orEmpty()
-                .map { it.toString() }
-            entries = viewEntries
-            binding.details.text = viewEntries.firstOrNull().orEmpty()
-        }
-    }
-
-    fun setSelection(selection: Int) {
-        if (selectedPosition < (popup?.menu?.size ?: 0)) {
-            popup?.menu?.getItem(selectedPosition)?.let {
-                it.icon = emptyIcon
-            }
-        }
-        selectedPosition = selection
-        popup?.menu?.getItem(selectedPosition)?.let {
-            it.icon = checkmarkIcon
-        }
-        binding.details.text = entries.getOrNull(selection).orEmpty()
-    }
-
-    private fun makeSettingsPopup(preference: Preference<Int>, offset: Int = 0, block: ((Int) -> Unit)? = null): PopupMenu {
-        return createPopupMenu { pos ->
-            preference.set(pos + offset)
-            block?.invoke(pos)
-        }
-    }
-
-    private fun makeSettingsPopup(): PopupMenu {
-        return createPopupMenu { pos ->
-            onItemSelectedListener?.invoke(pos)
-        }
-    }
-
-    private fun menuClicked(menuItem: MenuItem): Int {
-        val pos = menuItem.itemId
-        setSelection(pos)
-        return pos
-    }
-
-    @SuppressLint("RestrictedApi")
-    fun createPopupMenu(onItemClick: (Int) -> Unit): PopupMenu {
-        val popup = PopupMenu(context, this, Gravity.END, R.attr.actionOverflowMenuStyle, 0)
-        entries.forEachIndexed { index, entry ->
-            popup.menu.add(0, index, 0, entry)
-        }
-        (popup.menu as? MenuBuilder)?.setOptionalIconsVisible(true)
-        popup.menu.forEach {
-            it.icon = emptyIcon
-        }
-        popup.menu[selectedPosition].icon = checkmarkIcon
-        popup.setOnMenuItemClickListener { menuItem ->
-            val pos = menuClicked(menuItem)
-            onItemClick(pos)
-            true
-        }
-        return popup
-    }
-}