Remove no-op handlePerferenceTreeClick from PrefControllers

Bug: 33429853
Test: RunSettingsRoboTests
Change-Id: I5633953e3d7b07f9006e541b96a24a2a769e2686

src/com/android/settings/notification/PulseNotificationPreferenceController.java

@@ -68,11 +68,6 @@ public class PulseNotificationPreferenceController extends PreferenceController
         }
     }
 
-    @Override
-    public boolean handlePreferenceTreeClick(Preference preference) {
-        return false;
-    }
-
     @Override
     public String getPreferenceKey() {
         return KEY_NOTIFICATION_PULSE;