drivers: staging: rtl8723bs: Remove pmlmepriv->num_of_scanned

pmlmepriv->num_of_scanned is only ever set and never read, remove it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230221145326.7808-4-hdegoede@redhat.com


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