Revert "bt: add interface function to provide wakelock access"

This reverts commit 19f3696f852d6787076b70a7d31f5684ad2aa93f.
diff --git a/include/hardware/bluetooth.h b/include/hardware/bluetooth.h
index 5e100ec..c00a8f7 100644
--- a/include/hardware/bluetooth.h
+++ b/include/hardware/bluetooth.h
@@ -324,10 +324,6 @@
 /** TODO: Add callbacks for Link Up/Down and other generic
   *  notifications/callbacks */
 
-/** Wakelock callback */
-/* Called to take/release wakelock to allow timers to work (temporary kluge) */
-typedef void (*bt_wakelock_callback)(int acquire);
-
 /** Bluetooth DM callback structure. */
 typedef struct {
     /** set to sizeof(bt_callbacks_t) */
@@ -344,7 +340,6 @@
     callback_thread_event thread_evt_cb;
     dut_mode_recv_callback dut_mode_recv_cb;
     le_test_mode_callback le_test_mode_cb;
-    bt_wakelock_callback bt_wakelock_cb;
 } bt_callbacks_t;
 
 /** NOTE: By default, no profiles are initialized at the time of init/enable.