Remove obsolete MSVC version tests.

Don't compare __VISUALC__ with versions 1200 (VC6) and earlier, such tests are
always true or always false now that we don't support VC6 any more, so just
remove them simplifying the code.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76548 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/confbase.h

@@ -51,8 +51,7 @@ class WXDLLIMPEXP_FWD_BASE wxArrayString;
 
 // not all compilers can deal with template Read/Write() methods, define this
 // symbol if the template functions are available
-#if (!defined(__VISUALC__) || __VISUALC__ > 1200) && \
-    !defined( __VMS ) && \
+#if !defined( __VMS ) && \
     !(defined(__HP_aCC) && defined(__hppa))
     #define wxHAS_CONFIG_TEMPLATE_RW
 #endif