staging: rtl8723bs: remove obsolete 5Ghz comments

remove obsolete 5Ghz comments.

Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/608f0b08ffae821d695cb2eadcffbd592912c906.1624367072.git.fabioaiuto83@gmail.com


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