Remove unused fast scroll bubble drawable and accidentally committed file

app/src/main/java/eu/kanade/tachiyomi/widget/preference/ButtonToggleGroupPreference.kt

@@ -1,4 +0,0 @@
-package eu.kanade.tachiyomi.widget.preference
-
-class ButtonToggleGroupPreference {
-}

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

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
-    <corners android:radius="38dp" />
-    <solid android:color="?attr/colorPrimaryVariant" />
-    <size
-        android:width="30dp"
-        android:height="30dp" />
-</shape>

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

@@ -263,7 +263,6 @@
     <style name="FloatingTextView" parent="TextAppearance.AppCompat">
         <item name="android:layout_height">wrap_content</item>
         <item name="android:layout_width">wrap_content</item>
-        <item name="android:background">@drawable/material_bubble_drawable</item>
         <item name="android:elevation">5dp</item>
         <item name="android:paddingStart">12dp</item>
         <item name="android:paddingEnd">12dp</item>