ath5k: drop self from MAINTAINERS

I simply don't have any hobby hacking time after family time
and non-kernel-related job time, so I resume status as part-time
mailing list lurker.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

MAINTAINERS

@@ -1247,7 +1247,6 @@ ATHEROS ATH5K WIRELESS DRIVER
 M:	Jiri Slaby <jirislaby@gmail.com>
 M:	Nick Kossifidis <mickflemm@gmail.com>
 M:	"Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>
-M:	Bob Copeland <me@bobcopeland.com>
 L:	linux-wireless@vger.kernel.org
 L:	ath5k-devel@lists.ath5k.org
 W:	http://wireless.kernel.org/en/users/Drivers/ath5k