greybus: greybus_protocols: remove svc key-event type

Remove the deprecated svc key-event type, which has already been removed
from the specification.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/greybus_protocols.h

@@ -998,7 +998,6 @@ struct gb_spi_transfer_response {
 #define GB_SVC_TYPE_TIMESYNC_AUTHORITATIVE	0x0f
 #define GB_SVC_TYPE_INTF_SET_PWRM		0x10
 #define GB_SVC_TYPE_INTF_EJECT			0x11
-#define GB_SVC_TYPE_KEY_EVENT			0x12
 #define GB_SVC_TYPE_PING			0x13
 #define GB_SVC_TYPE_PWRMON_RAIL_COUNT_GET	0x14
 #define GB_SVC_TYPE_PWRMON_RAIL_NAMES_GET	0x15