Removing host deletion on startup and corresponding callbacks

> Launcher deletes the phantom widget ids in loader

Bug:141376165
Change-Id: Icf0542535f194f9abc67e7190f34cb60f69e9f66
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 9326e95..1a3f9dc 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -173,7 +173,7 @@
  * Default launcher application.
  */
 public class Launcher extends BaseDraggingActivity implements LauncherExterns,
-        Callbacks, LauncherProviderChangeListener, UserEventDelegate,
+        Callbacks, UserEventDelegate,
         InvariantDeviceProfile.OnIDPChangeListener, PluginListener<OverlayPlugin> {
     public static final String TAG = "Launcher";
 
@@ -614,13 +614,6 @@
         return mLauncherView.findViewById(id);
     }
 
-    @Override
-    public void onAppWidgetHostReset() {
-        if (mAppWidgetHost != null) {
-            mAppWidgetHost.startListening();
-        }
-    }
-
     private LauncherCallbacks mLauncherCallbacks;
 
     /**