staging: rtl8723bs: delete function rtw_set_chplan_cmd

The function rtw_set_chplan_cmd is not used. Remove it.

Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/b5a1fe5bc7bc8eb154247ee8eafafe6af266dab9.1662111798.git.namcaov@gmail.com


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