Revert "[OSX] fix resize calls before window shown."

This reverts commit 06807324d0.

native/Avalonia.Native/src/OSX/window.mm

@@ -27,7 +27,6 @@ public:
     AvnPoint lastPositionSet;
     NSString* _lastTitle;
     IAvnMenu* _mainMenu;
-    NSSize _lastSize;
     
     bool _shown;
     bool _inResize;
@@ -36,7 +35,6 @@ public:
     {
         _shown = false;
         _inResize = false;
-        _lastSize = NSSize { 0, 0 };
         _mainMenu = nullptr;
         BaseEvents = events;
         _glContext = gl;
@@ -227,17 +225,9 @@ public:
             if(ret == nullptr)
                 return E_POINTER;
             
-            if(!_shown)
-            {
-                ret->Width = _lastSize.width;
-                ret->Height = _lastSize.height;
-            }
-            else
-            {
-                auto frame = [View frame];
-                ret->Width = frame.size.width;
-                ret->Height = frame.size.height;
-            }
+            auto frame = [View frame];
+            ret->Width = frame.size.width;
+            ret->Height = frame.size.height;
             
             return S_OK;
         }
@@ -332,8 +322,6 @@ public:
             
             @try
             {
-                _lastSize = NSSize{x,y};
-                
                 if(!_shown)
                 {
                     BaseEvents->Resized(AvnSize{x,y}, reason);