patch 8.1.1306: Borland support is outdated and doesn't work

Problem:    Borland support is outdated and doesn't work.
Solution:   Remove Borland support, there are other (free) compilers
            available. (Thomas Dziedzic, Ken Takata, closes #4364)
diff --git a/src/GvimExt/gvimext.rc b/src/GvimExt/gvimext.rc
index 22102db..10476da 100644
--- a/src/GvimExt/gvimext.rc
+++ b/src/GvimExt/gvimext.rc
@@ -7,9 +7,7 @@
 //
 // Generated from the TEXTINCLUDE 2 resource.
 //
-#ifndef __BORLANDC__
-# include "winresrc.h"
-#endif
+#include "winresrc.h"
 
 /////////////////////////////////////////////////////////////////////////////
 #undef APSTUDIO_READONLY_SYMBOLS