staging: rtl8192e: Remove rtllib_stop_send_beacons

rtllib_start_send_beacons() is removed so no need for
rtllib_stop_send_beacons() anymore.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/17c5545102ad8f50ca320af17aafa555f8caec2d.1695387832.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>