Remove deprecated code #2914

Job	Run time
astropy / Load tox environments	7s
asdf / Load tox environments	4s
stsci / Load tox environments	7s
third-party / Load tox environments	4s
third-party / weldx (ubuntu-latest)	1m 12s
third-party / sunpy (ubuntu-latest)	3m 0s
third-party / dkist (ubuntu-latest)	1m 30s
third-party / abacusutils (ubuntu-latest)	3m 0s
asdf / asdf-wcs-schemas (ubuntu-latest)	1m 42s
asdf / asdf-coordinates-schemas (ubuntu-latest)	3m 17s
asdf / asdf-zarr (ubuntu-latest)	30s
asdf / asdf-compression (ubuntu-latest)	31s
astropy / asdf-astropy (ubuntu-latest)	2m 31s
astropy / specutils (ubuntu-latest)	1m 46s
stsci / astrocut (ubuntu-latest)	53s
stsci / gwcs (ubuntu-latest)	1m 2s
stsci / jwst (ubuntu-latest)	18m 39s
stsci / stdatamodels (ubuntu-latest)	2m 47s
stsci / stpipe (ubuntu-latest)	45s
stsci / roman_datamodels (ubuntu-latest)	1m 37s
	45m 4s

Provide feedback