Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"

This reverts commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f.

This patch introduces a possible null-ptr-def problem. Revert it. And the
fixed bug by this patch have resolved by commit 73f7b171b7c0 ("Bluetooth:
btsdio: fix use after free bug in btsdio_remove due to race condition").

Fixes: 1e9ac114c442 ("Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work")
Signed-off-by: Liu Jian <[e-mail]>
Signed-off-by: Luiz Augusto von Dentz <[e-mail]>

drivers/bluetooth/btsdio.c

···
 
 	BT_DBG("func %p", func);
 
-	cancel_work_sync(&data->work);
 	if (!data)
 		return;