staging: rtl8723bs: remove empty #ifdef block

remove #ifdef block left empty after DBG_871X_LEVEL
deletion.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/c2600c9a71d4e222963cbc600b2e703fe2b1289f.1618480688.git.fabioaiuto83@gmail.com


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