StImText: don't translate keyboard state again

Clutter translates keyboard state internally, and clears the lock bits
from modifier state, so translating again results in the wrong keysym.
Given that Clutter already gives us a fine keysym, we don't need this.

https://bugzilla.gnome.org/show_bug.cgi?id=692586

src/st/st-im-text.c

@@ -316,10 +316,6 @@ key_event_to_gdk (ClutterKeyEvent *event_clutter)
    * doesn't support XKB; we'll just end up with group == 0 */
   event_gdk->group = XkbGroupForCoreState (event_gdk->state);
 
-  gdk_keymap_translate_keyboard_state (keymap, event_gdk->hardware_keycode,
-                                       event_gdk->state, event_gdk->group,
-                                       &event_gdk->keyval, NULL, NULL, NULL);
-
   if (event_clutter->unicode_value)
     {
       /* This is not particularly close to what GDK does - event_gdk->string