Bluetooth: Fix dead-lock failure during LE scan

Timer being deleted durings it's time-out callback execution caused
spinlock deadlock on multicore systems.

CRs-fixed: 305677
Signed-off-by: Brian Gix <bgix@codeaurora.org>

net/bluetooth/mgmt.c

@@ -1755,7 +1755,6 @@ static void disco_le_to(unsigned long data)
 	BT_DBG("hci%d", ilp->index);
 
 	hdev = hci_dev_get(ilp->index);
-	del_timer_sync(&ilp->le_timer);
 
 	if (hdev) {
 		hci_dev_lock(hdev);