Staging: rtl8192e: remove some dead code

We don't use the rxcmdpkt[] counters at all and we can remove them.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
ACKed-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>