MAINTAINERS: wifi: wl12xx: remove git tree

Luca's tree hasn't been used for 10 years so remove it.
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230828123603.87621-4-kvalo@kernel.org

MAINTAINERS

@@ -21512,7 +21512,6 @@ L:	linux-wireless@vger.kernel.org
 S:	Orphan
 W:	https://wireless.wiki.kernel.org/en/users/Drivers/wl12xx
 W:	https://wireless.wiki.kernel.org/en/users/Drivers/wl1251
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/luca/wl12xx.git
 F:	drivers/net/wireless/ti/
 
 TIMEKEEPING, CLOCKSOURCE CORE, NTP, ALARMTIMER