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

remove conditional code blocks checked by unused CONFIG_WOWLAN

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/1d4e09852ff08e7121e9dd6d2d55d819d53ed702.1615744948.git.fabioaiuto83@gmail.com


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