dix: remove unused and half-broken code to restore original classes.

In theory, the MD should change back to its old, original classes when the
last SD is detached. Thanks to the XTEST devices, we'll always have an SD
attached until the MD is removed.  So let's not worry about that and do
nothing instead of having some code that's essentially untested.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

dix/devices.c

@@ -2374,30 +2374,11 @@ AttachDevice(ClientPtr client, DeviceIntPtr dev, DeviceIntPtr master)
         RecalculateMasterButtons(master);
     }
 
-    /* If we were connected to master device before, this MD may need to
+    /* XXX: in theory, the MD should change back to its old, original
-     * change back to it's original classes.
+     * classes when the last SD is detached. Thanks to the XTEST devices,
+     * we'll always have an SD attached until the MD is removed.
+     * So let's not worry about that.
      */
-    if (oldmaster)
-    {
-        DeviceIntPtr it;
-        for (it = inputInfo.devices; it; it = it->next)
-            if (!IsMaster(it) && it->u.master == oldmaster)
-                break;
-
-        if (!it)  /* no dev is paired with old master */
-        {
-            EventListPtr event = NULL;
-
-            /* XXX: reset master back to defaults */
-            event = InitEventList(1);
-            SetMinimumEventSize(event, 1, sizeof(DeviceChangedEvent));
-            CreateClassesChangedEvent(event, oldmaster, oldmaster,
-                                      DEVCHANGE_POINTER_EVENT | DEVCHANGE_KEYBOARD_EVENT);
-            XISendDeviceChangedEvent(oldmaster, oldmaster,
-                                     (DeviceChangedEvent*)event->event);
-            FreeEventList(event, 1);
-        }
-    }
 
     return Success;
 }