moving common implementation for osx closer to unix, by using threadspsx.cpp and unix/dir.cpp, getting rid of morefile(x) and moving colour.cpp to core

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54889 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/thrimpl.cpp

@@ -340,13 +340,9 @@ wxSemaError wxSemaphore::Post()
 // wxThread
 // ----------------------------------------------------------------------------
 
-#ifndef __WXMAC__
-
 #include "wx/utils.h"
 
 void wxThread::Sleep(unsigned long milliseconds)
 {
     wxMilliSleep(milliseconds);
 }
-
-#endif // __WXMAC__