staging: rtl8188eu: remove commented code

Remove unused commented code in the file core/rte_xmit.c.
Clears 'please, no space before tabs' and 'line over 80
characters' checkpatch warnings.

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