staging: rtl8723bs: remove unused code blocks conditioned by never set CONFIG_SW_CHANNEL_PLAN

remove conditional code blocks checked by unused
CONFIG_SW_CHANNEL_PLAN

cleaning required in TODO file:

find and remove code blocks guarded by never set CONFIG_FOO defines

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/fff259ea5895a5875c37ee0cfacd1be6cd5664fb.1615801722.git.fabioaiuto83@gmail.com


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