remove game config activity's menu. It was down to one item and that

(revert) isn't needed if the confirm logic is working.

xwords4/android/XWords4/res/menu/game_config_menu.xml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:id="@+id/game_config_revert"
-          android:title="@string/game_config_revert"
-          />
-</menu>

xwords4/android/XWords4/res/values-ca/strings.xml

@@ -18,7 +18,6 @@
     <string name="menu_delete">Suprimeix</string>
     <string name="menu_insert">Afegeix una partida</string>
     <string name="button_new_game">Afegeix una partida</string>
-    <string name="menu_revert">Reverteix</string>
 
     <!-- <string name="list_item_open">Obre</string> -->
     <string name="list_item_view">Configura</string>

xwords4/android/XWords4/res/values/strings.xml

@@ -18,7 +18,6 @@
     <string name="menu_delete">Delete</string>
     <string name="menu_insert">Add game</string>
     <string name="button_new_game">Add game</string>
-    <string name="menu_revert">Revert changes</string>
 
     <string name="list_item_config">Configure</string>
     <string name="list_item_hide">Hide</string>

xwords4/android/XWords4/src/org/eehouse/android/xw4/GameConfig.java

@@ -475,29 +475,6 @@ public class GameConfig extends Activity implements View.OnClickListener {
         return handled;
     }
 
-    @Override
-    public boolean onCreateOptionsMenu( Menu menu )
-    {
-        MenuInflater inflater = getMenuInflater();
-        inflater.inflate( R.menu.game_config_menu, menu );
-        return true;
-    }
-
-    @Override
-    public boolean onOptionsItemSelected( MenuItem item )
-    {
-        boolean handled = true;
-
-        switch( item.getItemId() ) {
-        case R.id.game_config_revert:
-            finish();
-            break;
-        default:
-            handled = false;
-        }
-        return handled;
-    } // onOptionsItemSelected
-
     public void onClick( View view ) 
     {
         if ( m_addPlayerButton == view ) {