[scitos_description] Remove chest camera from urdf, moved to strands_description

This pull:

* Removes the `calibrate_chest` package, moved to `strands_movebase`
* Removes chest camera links from robot urdf
* Removes launching of `chest_calibration_publisher.launch`

Gonna try it out tomorrow on Rosie, to be merged together with https://github.com/strands-project/strands_movebase/pull/3.