Revert "Add support for taskbar background to wrap around hotseat"

This reverts commit 5dc07d786f.

Reason for revert: b/360116669

Bug: 345768019
Change-Id: Id70ceed141e2106f746d4a0e68a09675ba45dd28
Fixes: 360116669
Test: open taskbar, open all apps w/ ime, use ime back button
Flag: com.android.launcher3.enable_scaling_reveal_home_animation

quickstep/src/com/android/launcher3/taskbar/TaskbarDragLayer.java

@@ -22,7 +22,6 @@ import static com.android.launcher3.config.FeatureFlags.ENABLE_TASKBAR_NAVBAR_UN
 
 import android.content.Context;
 import android.graphics.Canvas;
-import android.graphics.Rect;
 import android.graphics.RectF;
 import android.media.permission.SafeCloseable;
 import android.util.AttributeSet;
@@ -260,11 +259,6 @@ public class TaskbarDragLayer extends BaseDragLayer<TaskbarActivityContext> {
         return mBackgroundRenderer.getLastDrawnTransientRect();
     }
 
-    /** Returns the rect used to transform transient taskbar to the hotseat */
-    public Rect getTaskbarToHotseatOffsetRect() {
-        return mBackgroundRenderer.getTaskbarToHotseatOffsetRect();
-    }
-
     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
         TestLogging.recordMotionEvent(TestProtocol.SEQUENCE_MAIN, "Touch event", ev);