ath5k: remove obsolete declaration of struct ieee80211_hw_mode

Signed-off-by: Helmut Schaa <hschaa@suse.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath5k/debug.h

@@ -63,7 +63,6 @@
 
 struct ath5k_softc;
 struct ath5k_hw;
-struct ieee80211_hw_mode;
 struct sk_buff;
 struct ath5k_buf;