staging: rtl8723bs: remove DBG_871X_SEL_NL macro declaration

remove DBG_871X_SEL_NL obsolete macro declaration.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/8839231b53881c8bf1f8a4d70953ec8acaa2fe95.1618401896.git.fabioaiuto83@gmail.com


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