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/LauncherTaskbarUIController.java

@@ -24,7 +24,6 @@ import static com.android.launcher3.taskbar.TaskbarLauncherStateController.FLAG_
 
 import android.animation.Animator;
 import android.animation.AnimatorSet;
-import android.graphics.Rect;
 import android.window.RemoteTransition;
 
 import androidx.annotation.NonNull;
@@ -189,24 +188,6 @@ public class LauncherTaskbarUIController extends TaskbarUIController {
                 placeholderDuration));
     }
 
-    /**
-     * Returns the bounds of launcher's hotseat.
-     */
-    public void getHotseatBounds(Rect hotseatBoundsOut) {
-        DeviceProfile launcherDP = mLauncher.getDeviceProfile();
-        if (launcherDP.isQsbInline) {
-            // Not currently supported.
-            hotseatBoundsOut.setEmpty();
-            return;
-        }
-        int left = (launcherDP.widthPx - launcherDP.getHotseatWidthPx()
-                - mLauncher.getHotseat().getUnusedHorizontalSpace()) / 2;
-        int right = left + launcherDP.getHotseatWidthPx();
-        int bottom = launcherDP.getHotseatLayoutPadding(mLauncher).bottom;
-        int top = bottom - launcherDP.hotseatCellHeightPx;
-        hotseatBoundsOut.set(left, top, right, bottom);
-    }
-
     /**
      * Should be called from onResume() and onPause(), and animates the Taskbar accordingly.
      */