staging: rtl8188eu: remove unnecessary comments in rtw_mlme_ext.c

Remove comments from 'endif's where the corresponding 'if' is just
a few lines above to improve readability.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>