Don't spew a g_warning if inotify setup fails

We use is_supported when we are trying to find a local file monitor
implementation that works, and having the g_warning in there trips
the test suite.

gio/inotify/inotify-helper.c

@@ -86,7 +86,6 @@ _ih_startup (void)
   result = _ip_startup (ih_event_callback);
   if (!result)
     {
-      g_warning ("Could not initialize inotify\n");
       G_UNLOCK (inotify_lock);
       return FALSE;
     }