Remove all conditional compilation w.r.t. disabling exceptions in Glib since that is no longer supported anyway.

rtgui/rtwindow.cc

@@ -94,21 +94,12 @@ RTWindow::RTWindow ()
     Glib::ustring fName = "rt-logo.png";
     Glib::ustring fullPath = RTImage::findIconAbsolutePath(fName);
 
-#ifdef GLIBMM_EXCEPTIONS_ENABLED
-
     try {
         set_default_icon_from_file (fullPath);
     } catch(Glib::Exception& ex) {
         printf ("%s\n", ex.what().c_str());
     }
 
-#else
-    {
-        std::auto_ptr<Glib::Error> error;
-        set_default_icon_from_file (fullPath, error);
-    }
-#endif //GLIBMM_EXCEPTIONS_ENABLED
-
 #if defined(__APPLE__)
     {
         osxApp  = (GtkosxApplication *)g_object_new (GTKOSX_TYPE_APPLICATION, NULL);