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

src/com/android/launcher3/DeviceProfile.java

@@ -1056,6 +1056,7 @@ public class DeviceProfile {
         return mHotseatColumnSpan;
     }
 
+    @VisibleForTesting
     public int getHotseatWidthPx() {
         return mHotseatWidthPx;
     }