wil6210: remove wil6210_uapi.h from MAINTAINERS

This file doesn't exist.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

MAINTAINERS

@@ -14565,7 +14565,6 @@ L:	wil6210@qca.qualcomm.com
 S:	Supported
 W:	http://wireless.kernel.org/en/users/Drivers/wil6210
 F:	drivers/net/wireless/ath/wil6210/
-F:	include/uapi/linux/wil6210_uapi.h
 
 WIMAX STACK
 M:	Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>