No real changes, just remove an unneeded header dependency.

There was some commented out code in (core) valgen.cpp file using
wxDatePickerCtrl (from adv library). Also comment out the inclusion of
wx/datectrl.h header as it's not needed as long as this code remains commented
out and creates an unexpected dependency of a core library file on an adv
library header.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66533 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/valgen.cpp

@@ -38,7 +38,7 @@
 #endif
 
 #include "wx/spinctrl.h"
-#include "wx/datectrl.h"
+// #include "wx/datectrl.h" -- can't use it in this (core) file for now
 
 #if wxUSE_SPINBTN
     #include "wx/spinbutt.h"