Remove some unused resources

app/src/main/res/drawable/list_item_selector.xml

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<ripple xmlns:android="http://schemas.android.com/apk/res/android"
-    android:color="?attr/colorControlHighlight">
-    <item>
-        <selector>
-            <item android:state_selected="true">
-                <color android:color="?attr/colorControlHighlight" />
-            </item>
-
-            <item android:state_activated="true">
-                <color android:color="?attr/colorControlHighlight" />
-            </item>
-
-            <item>
-                <color android:color="?attr/colorSurface" />
-            </item>
-        </selector>
-    </item>
-</ripple>

app/src/main/res/layout/common_spinner_item.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@android:id/text1"
-    style="@style/Widget.Tachiyomi.SpinnerItem"
-    android:layout_width="match_parent"
-    android:layout_height="?attr/dropdownListPreferredItemHeight"
-    android:ellipsize="end"
-    android:singleLine="true" />

app/src/main/res/values/styles.xml

@@ -63,16 +63,6 @@
     </style>
 
 
-    <!--=======-->
-    <!--Widgets-->
-    <!--=======-->
-
-    <style name="Widget.Tachiyomi.SpinnerItem" parent="Widget.AppCompat.DropDownItem.Spinner">
-        <item name="android:textColor">?attr/colorOnSurface</item>
-        <item name="android:background">@drawable/list_item_selector</item>
-    </style>
-
-
     <!--=======================-->
     <!--Widgets.MaterialDivider-->
     <!--=======================-->