remove usage of wxT() macro; it makes example code a bit harder to read

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58212 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/menuitem.h

@@ -73,7 +73,7 @@ public:
         helpMenu->Append(wxID_ABOUT);
 
         // use the stock label and the stock accelerator but not the stock help string:
-        helpMenu->Append(wxID_ABOUT, wxEmptyString, wxT("My custom help string"));
+        helpMenu->Append(wxID_ABOUT, wxEmptyString, "My custom help string");
 
         // use all stock properties except for the bitmap:
         wxMenuItem *mymenu = new wxMenuItem(helpMenu, wxID_ABOUT);