staging: rtl8723bs: remove unused DBG_871X_LEVEL macro declarations

remove unused DBG_871X_LEVEL macro declarations.

DBG_871X_LEVEL macro wraps a raw printk call which is not
recommended in a device driver context, prefer using
netdev_*() log functions.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/ec371fd8a4e53b4730b45f0a1c9210106b2914f2.1618480688.git.fabioaiuto83@gmail.com


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