staging: r8188eu: remove rtw_check_beacon_data()

Function rtw_check_beacon_data() is not used, remove it.
It is the only user of start_bss_network() which is the only user
of update_hw_ht_param(). Remove these two functions as well.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210919153659.20826-6-straube.linux@gmail.com


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