Remove no-op handlePerferenceTreeClick from PrefControllers

Bug: 33429853
Test: RunSettingsRoboTests
Change-Id: I5633953e3d7b07f9006e541b96a24a2a769e2686

src/com/android/settings/display/NightDisplayPreferenceController.java

@@ -27,11 +27,6 @@ public class NightDisplayPreferenceController extends PreferenceController {
         super(context);
     }
 
-    @Override
-    public boolean handlePreferenceTreeClick(Preference preference) {
-        return false;
-    }
-
     @Override
     public boolean isAvailable() {
         return NightDisplayController.isAvailable(mContext);