Bluetooth: trivial: Remove unneeded assignment

Assignment is not needed here since err is always gets value.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

net/bluetooth/l2cap_core.c

@@ -4386,7 +4386,7 @@ static void l2cap_logical_finish_create(struct l2cap_chan *chan,
 	set_bit(CONF_OUTPUT_DONE, &chan->conf_state);
 
 	if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
-		int err = 0;
+		int err;
 
 		set_default_fcs(chan);