Make code more concise and move method to a more appropriate place

osu.Game/OsuGame.cs

@@ -531,6 +531,13 @@ protected override void Dispose(bool isDisposing)
             SentryLogger.Dispose();
         }
 
+        protected override IDictionary<FrameworkSetting, object> GetFrameworkConfigDefaults()
+            => new Dictionary<FrameworkSetting, object>
+            {
+                // General expectation that osu! starts in fullscreen by default (also gives the most predictable performance)
+                { FrameworkSetting.WindowMode, WindowMode.Fullscreen }
+            };
+
         protected override void LoadComplete()
         {
             base.LoadComplete();
@@ -1013,13 +1020,5 @@ private void screenExited(IScreen lastScreen, IScreen newScreen)
             if (newScreen == null)
                 Exit();
         }
-
-        protected override IDictionary<FrameworkSetting, object> GetFrameworkConfigDefaults()
-        {
-            // Overriding config defaults determined by Framework
-            IDictionary<FrameworkSetting, object> defaultOverrides = new Dictionary<FrameworkSetting, object>();
-            defaultOverrides.Add(FrameworkSetting.WindowMode, WindowMode.Fullscreen);
-            return defaultOverrides;
-        }
     }
 }