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

remove conditional code blocks checked by unused
CONFIG_GPIO_API

cleaning required in TODO file:

find and remove code blocks guarded by never set CONFIG_FOO defines

Changes in v2:
	rebase of conflicting code in public staging-testing

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/20210316142714.GA3368@agape.jhs


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