wxThread::Sleep() is the same as wxMilliSleep() on all platforms but Mac (and maybe it should be the same thing there as well)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53134 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/thread.cpp

@@ -569,13 +569,6 @@ void wxThread::Yield()
     ::DosSleep(0);
 }
 
-void wxThread::Sleep(
-  unsigned long                     ulMilliseconds
-)
-{
-    ::DosSleep(ulMilliseconds);
-}
-
 int wxThread::GetCPUCount()
 {
     ULONG CPUCount;