Revert "Add full predictive back support (#2085)" (#2362)

This reverts commit c12bdbae8e.

app/src/main/java/eu/kanade/tachiyomi/util/view/ViewExtensions.kt

@@ -4,11 +4,9 @@ package eu.kanade.tachiyomi.util.view
 
 import android.content.res.Resources
 import android.graphics.Rect
-import android.os.Build
 import android.view.Gravity
 import android.view.Menu
 import android.view.MenuItem
-import android.view.RoundedCorner
 import android.view.View
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
@@ -97,22 +95,3 @@ fun View?.isVisibleOnScreen(): Boolean {
         Rect(0, 0, Resources.getSystem().displayMetrics.widthPixels, Resources.getSystem().displayMetrics.heightPixels)
     return actualPosition.intersect(screen)
 }
-
-/**
- * Returns window radius (in pixel) applied to this view
- */
-fun View.getWindowRadius(): Int {
-    val rad = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-        val windowInsets = rootWindowInsets
-        listOfNotNull(
-            windowInsets.getRoundedCorner(RoundedCorner.POSITION_TOP_LEFT),
-            windowInsets.getRoundedCorner(RoundedCorner.POSITION_TOP_RIGHT),
-            windowInsets.getRoundedCorner(RoundedCorner.POSITION_BOTTOM_LEFT),
-            windowInsets.getRoundedCorner(RoundedCorner.POSITION_BOTTOM_RIGHT),
-        )
-            .minOfOrNull { it.radius }
-    } else {
-        null
-    }
-    return rad ?: 0
-}