Gui: Update MSVC legacy code comments from ViewProviderLink.

src/Gui/ViewProviderLink.cpp

@@ -313,12 +313,8 @@ public:
         }
     }
 
-    // VC2013 has trouble with template argument dependent lookup in
+    // MSVC has trouble with template argument dependent lookup in
     // namespace. Have to put the below functions in global namespace.
-    //
-    // However, gcc seems to behave the opposite, hence the conditional
-    // compilation  here.
-    //
 #if defined(_MSC_VER)
     friend void Gui::intrusive_ptr_add_ref(LinkInfo *px);
     friend void Gui::intrusive_ptr_release(LinkInfo *px);