Good riddance UserEventDispatcher [1/n]

Bug: 165675920
Change-Id: I237ed4243e1724b3c370c5660673bb3966bf4811
diff --git a/src/com/android/launcher3/DragSource.java b/src/com/android/launcher3/DragSource.java
index d4d7b99..ba227d4 100644
--- a/src/com/android/launcher3/DragSource.java
+++ b/src/com/android/launcher3/DragSource.java
@@ -19,12 +19,11 @@
 import android.view.View;
 
 import com.android.launcher3.DropTarget.DragObject;
-import com.android.launcher3.logging.StatsLogUtils.LogContainerProvider;
 
 /**
  * Interface defining an object that can originate a drag.
  */
-public interface DragSource extends LogContainerProvider {
+public interface DragSource {
 
     /**
      * A callback made back to the source after an item from this source has been dropped on a