Anthony/455 ros2 on navtube - #504
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The imu-socat alias created a /dev/ttyV0 pseudo-terminal that tunneled the navtube Pi's IMU serial stream over TCP so the vectornav node could run on the Jetson. joe_shmore.py existed only to babysit that fake port, flushing its buffers when nothing held it open. Per #455, vectornav will run directly on the Pi and read the IMU's real local serial device, publishing over ROS 2 topics (DDS handles the cross-machine transport). That makes both the socat tunnel and its keepalive obsolete, so this removes them. Still pending: the serial port in the vectornav submodule config (/dev/ttyV0 -> real device path) is not changed yet, since it needs the actual device path from the Pi and a decision on where that override should live.
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Remove socat IMU bridge ahead of Pi migration
Part of #455.
Removes the imu-socat alias from scripts/setup.bash and deletes joe_shmore.py. Both existed only to support the /dev/ttyV0 pseudo-terminal that tunneled the navtube Pi's IMU serial over TCP so vectornav could run on the Jetson. Once vectornav runs on the Pi reading the real local serial device (rest of #455), the tunnel and its buffer-flush keepalive are obsolete.
Still pending / not in this PR: the serial port in the vectornav submodule config (/dev/ttyV0 → real device path) — needs the actual path from the Pi and a decision on where the override should live. Tracking in #455.