xmlhelp: MSVC: pragma warning: make more specific, remove obsolete

Change-Id: I211a6f95f7146d7ffaa0c44af786c4474abc73f4
Reviewed-on: https://gerrit.libreoffice.org/49058Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

xmlhelp/source/cxxhelp/provider/resultsetforquery.cxx

@@ -28,11 +28,6 @@
 
 #include <helpcompiler/HelpSearch.hxx>
 
-#if defined _MSC_VER
-#pragma warning(push)
-#pragma warning(disable : 4068 4263 4264 4266)
-#endif
-
 #if defined(__GNUC__)
 #  pragma GCC visibility push (default)
 #endif
@@ -41,10 +36,6 @@
 #  pragma GCC visibility pop
 #endif
 
-#if defined _MSC_VER
-#pragma warning(pop)
-#endif
-
 #include <rtl/ustring.hxx>
 
 #include <algorithm>