wifi: cw1200: Remove unused cw1200_queue_requeue_all()

cw1200_queue_requeue_all() has been unused since it was added in 2013 by commit
a910e4a9 ("cw1200: add driver for the ST-E CW1100 & CW1200 WLAN chipsets")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/20241012203852.229151-1-linux@treblig.org