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

Change-Id: If36242e93a700313becbd37ceae06491fcd84b8a
Reviewed-on: https://gerrit.libreoffice.org/49052Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

tools/source/inet/inetmsg.cxx

@@ -192,11 +192,6 @@ bool INetMIMEMessage::ParseDateField (
               (rDateTime.GetHour() > 23)    ));
 }
 
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning( disable : 4592)
-#endif
-
 static const std::map<InetMessageMime, const char*> ImplINetMIMEMessageHeaderData =
 {
     { InetMessageMime::VERSION, "MIME-Version"},
@@ -205,10 +200,6 @@ static const std::map<InetMessageMime, const char*> ImplINetMIMEMessageHeaderDat
     { InetMessageMime::CONTENT_TRANSFER_ENCODING, "Content-Transfer-Encoding"}
 };
 
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
 INetMIMEMessage::INetMIMEMessage()
     : pParent(nullptr)
 {