staging: rtl8188eu: rtw_mlme_ext.c: remove commented code

This line is connented since the initial import in commit 7b464c9f
("staging: r8188eu: Add files for new driver - part 4") and there's no
comment stating how it could ever be useful.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>