uavcan: remove actuator_direct (no publisher)

msg/CMakeLists.txt

@@ -34,7 +34,6 @@
 set(msg_files
 	actuator_armed.msg
 	actuator_controls.msg
-	actuator_direct.msg
 	actuator_outputs.msg
 	adc_report.msg
 	airspeed.msg

msg/actuator_direct.msg

@@ -1,4 +0,0 @@
-uint64 timestamp			# time since system start (microseconds)
-uint8 NUM_ACTUATORS_DIRECT = 16
-uint32 nvalues				# number of valid values
-float32[16] values			# actuator values, from -1 to 1

msg/tools/uorb_rtps_message_ids.yaml

@@ -3,8 +3,6 @@ rtps:
     id: 0
   - msg: actuator_controls
     id: 1
-  - msg: actuator_direct
-    id: 2
   - msg: actuator_outputs
     id: 3
   - msg: adc_report