WIP: replay overhaul (no more special ekf2 replay)

msg/CMakeLists.txt

@@ -74,7 +74,6 @@ set(msg_files
 	DifferentialDriveSetpoint.msg
 	DifferentialPressure.msg
 	DistanceSensor.msg
-	Ekf2Timestamps.msg
 	EscReport.msg
 	EscStatus.msg
 	EstimatorAidSource1d.msg

msg/Ekf2Timestamps.msg

@@ -1,23 +0,0 @@
-# this message contains the (relative) timestamps of the sensor inputs used by EKF2.
-# It can be used for reproducible replay.
-
-# the timestamp field is the ekf2 reference time and matches the timestamp of
-# the sensor_combined topic.
-
-uint64 timestamp			 # time since system start (microseconds)
-
-int16 RELATIVE_TIMESTAMP_INVALID = 32767 # (0x7fff) If one of the relative timestamps
-                                         # is set to this value, it means the associated sensor values did not update
-
-# timestamps are relative to the main timestamp and are in 0.1 ms (timestamp +
-# *_timestamp_rel = absolute timestamp). For int16, this allows a maximum
-# difference of +-3.2s to the sensor_combined topic.
-
-int16 airspeed_timestamp_rel
-int16 distance_sensor_timestamp_rel
-int16 optical_flow_timestamp_rel
-int16 vehicle_air_data_timestamp_rel
-int16 vehicle_magnetometer_timestamp_rel
-int16 visual_odometry_timestamp_rel
-
-# Note: this is a high-rate logged topic, so it needs to be as small as possible