staging: r8188eu: remove mlme_osdep.h

The function indicate_wx_scan_complete_event() is declared multiple
times. That is not needed. Remove redundant declarations to clean up
the driver code and remove the now empty header mlme_osdep.h.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220901172120.8485-1-straube.linux@gmail.com


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