staging: r8188eu: remove unused macros from ieee80211.h

Remove unused macros from ieee80211.h.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220405060813.8448-3-straube.linux@gmail.com


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