Remove the overflow menu from the usage Appbar.

In Data Usage screen, Above the data bar, Remove the overflow
menu (3 dots on top right of the screen) from the Appbar.

Bug: 70950124

Test: manual
Test: make RunSettingsRoboTests
Change-Id: I4e8a5e54b1e5c573496ff2a76a5a80da38650f2b

src/com/android/settings/datausage/DataUsageSummary.java

@@ -127,14 +127,6 @@ public class DataUsageSummary extends DataUsageBaseFragment implements Indexable
         setHasOptionsMenu(true);
     }
 
-    @Override
-    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
-        if (UserManager.get(getContext()).isAdminUser()) {
-            inflater.inflate(R.menu.data_usage, menu);
-        }
-        super.onCreateOptionsMenu(menu, inflater);
-    }
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {