Remove unnecessary functions from AssistGestureFeatureProvider

Fixes: 62945918

Test: make -j RunSettingsRoboTests && manual
Change-Id: I13438e6741a3398d06917b45f098c13df7dff97e

src/com/android/settings/gestures/AssistGestureFeatureProviderImpl.java

@@ -37,11 +37,6 @@ public class AssistGestureFeatureProviderImpl implements AssistGestureFeaturePro
         return false;
     }
 
-    @Override
-    public int getPreferenceResourceId() {
-        return R.xml.assist_gesture_settings;
-    }
-
     @Override
     public List<AbstractPreferenceController> getControllers(Context context, Lifecycle lifecycle) {
         return new ArrayList<>();