Revert "Fix 3041579 overscroll effect in notification area looks strange"

This reverts commit ab014a03a06a0044106ed9ad612b11e8197c8734.
diff --git a/packages/SystemUI/res/layout/status_bar_expanded.xml b/packages/SystemUI/res/layout/status_bar_expanded.xml
index 9e33f01..b5b1b50 100644
--- a/packages/SystemUI/res/layout/status_bar_expanded.xml
+++ b/packages/SystemUI/res/layout/status_bar_expanded.xml
@@ -71,7 +71,6 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:fadingEdge="none"
-            android:overscrollMode="ifContentScrolls"
             >
             <com.android.systemui.statusbar.NotificationLinearLayout
                 android:id="@+id/notificationLinearLayout"