ANDROID: binder: Remove obsolete proc waitqueue.

It was no longer being used.

Change-Id: I7fc42b76f688a459ad990f59fbd7006b96bb91a6
Signed-off-by: Martijn Coenen <maco@android.com>
(cherry picked from commit 610c835673)

drivers/android/binder.c

@@ -520,8 +520,6 @@ struct binder_priority {
  *                        (protected by @inner_lock)
  * @todo:                 list of work for this process
  *                        (protected by @inner_lock)
- * @wait:                 wait queue head to wait for proc work
- *                        (invariant after initialized)
  * @stats:                per-process binder statistics
  *                        (atomics, no lock needed)
  * @delivered_death:      list of delivered death notification
@@ -565,7 +563,6 @@ struct binder_proc {
 	bool is_dead;
 
 	struct list_head todo;
-	wait_queue_head_t wait;
 	struct binder_stats stats;
 	struct list_head delivered_death;
 	int max_threads;