msg: remove unused vehicle_actuator_setpoint topic

msg/CMakeLists.txt

@@ -164,7 +164,6 @@ set(msg_files
 	ulog_stream.msg
 	ulog_stream_ack.msg
 	vehicle_acceleration.msg
-	vehicle_actuator_setpoint.msg
 	vehicle_air_data.msg
 	vehicle_angular_acceleration.msg
 	vehicle_angular_acceleration_setpoint.msg

msg/vehicle_actuator_setpoint.msg

@@ -1,6 +0,0 @@
-uint64 timestamp                   # time since system start (microseconds)
-uint64 timestamp_sample            # the timestamp the data this control response is based on was sampled
-
-uint8 NUM_ACTUATOR_SETPOINT = 16
-
-float32[16] actuator