Remove MSVC6 support.

Don't support this compiler any more, this allows to get rid of tons of
MSVC6-specific workarounds, in particular we can now use Bind() and natural
template functions calls in the library code.

Also remove MSVC6 project and solution files and don't generate them when
bakefile_gen is ran any more (removing the remaining occurrences of msvc6prj
from the bakefiles results in weird bake-time errors, so it's simpler to just
leave them there).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76532 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/missing.h

@@ -10,24 +10,6 @@
 #ifndef _WX_MISSING_H_
 #define _WX_MISSING_H_
 
-/*
- * The following are required for VC++ 6.
- */
-
-// Needed by cursor.cpp
-#ifndef IDC_HAND
-    #define IDC_HAND MAKEINTRESOURCE(32649)
-#endif
-
-// Needed by strconv.cpp
-#ifndef WC_NO_BEST_FIT_CHARS
-    #define WC_NO_BEST_FIT_CHARS 0x400
-#endif
-
-#ifndef WM_CONTEXTMENU
-    #define WM_CONTEXTMENU      0x007B
-#endif
-
 #ifndef WM_CHANGEUISTATE
     #define WM_CHANGEUISTATE    0x0127
 #endif
@@ -526,8 +508,7 @@ typedef struct
 
 #endif
 
-//Various defines that will be needed by mingw and possibly VC++6
-//Used by the webview library
+// Various defines used by the webview library that are needed by mingw 
 
 #ifndef DISPID_COMMANDSTATECHANGE
 #define DISPID_COMMANDSTATECHANGE 105