staging: rtl8187se: Delete commented code and whiteline

Delete all commented code and whitelines in
ieee80211/ieee80211_crypt_wep.c that are not necessary.

Fix sparse warnings:
ERROR: do not use C99 // comments

Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>