android: frontend: menu_settings: Remove save button.

src/android/app/src/main/java/org/citra/citra_android/ui/settings/SettingsActivityPresenter.java

@@ -137,12 +137,6 @@ public final class SettingsActivityPresenter {
     }
 
     public boolean handleOptionsItem(int itemId) {
-        switch (itemId) {
-            case R.id.menu_save_exit:
-                mView.finish();
-                return true;
-        }
-
         return false;
     }
 

src/android/app/src/main/res/menu/menu_settings.xml

@@ -1,11 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">
-
-    <item
-        android:id="@+id/menu_save_exit"
-        android:title="@string/preferences_save_exit"
-        android:icon="@drawable/ic_quicksave"
-        app:showAsAction="ifRoom"/>
-
 </menu>