Do not export template wxMSWOwnerDrawnButton class from the DLL.

This doesn't seem to be necessary even for ICC, finally, see #16237.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76492 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/ownerdrawnbutton.h

@@ -91,7 +91,7 @@ private:
 // This class uses a weak version of CRTP, i.e. it's a template class taking
 // the base class that the class deriving from it would normally derive from.
 template <class T>
-class WXDLLIMPEXP_CORE wxMSWOwnerDrawnButton
+class wxMSWOwnerDrawnButton
     : public T,
       private wxMSWOwnerDrawnButtonBase
 {