Remove the conditional preprocessor directive around wx/stockitem.h, the head file not cause any problem, revert the mistake that I made in 2e2b1313d97ea1c79a396333f40872157fd629d4

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77770 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/univ/tglbtn.cpp

@@ -21,9 +21,7 @@
 #include "wx/univ/colschem.h"
 #include "wx/univ/theme.h"
 
-#if defined(__WXMSW__)
 #include "wx/stockitem.h"
-#endif
 
 wxDEFINE_EVENT( wxEVT_TOGGLEBUTTON, wxCommandEvent );