preparation for allowing to use wxTimer in wxBase (heavily modified patch 1113088):

1. Changed wxTimer to use wxTimerImpl
2. Added Unix-specific generic timer implementation
3. Added wxAppTraits::CreateTimerImpl()


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45544 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/utils.cpp

@@ -29,7 +29,6 @@
     #include "wx/app.h"
     #include "wx/intl.h"
     #include "wx/log.h"
-    #include "wx/timer.h"
 #endif  //WX_PRECOMP
 
 #include "wx/msw/registry.h"