Eliminate legacy interface and obsolete large_data option #1239

Job	Run time
check_commit	11s
ubuntu-latest, black	34s
ubuntu-latest, py38-test	6m 25s
ubuntu-latest, py310-test-cov	7m 21s
windows-latest, py310-test	8m 41s
macos-latest, py310-test	9m 56s
ubuntu-latest, py310-test-alldeps-cov	21m 43s
ubuntu-latest, py38-test-astropy4-cov	7m 28s
ubuntu-latest, py310-test-astropy5	8m 15s
ubuntu-latest, py310-test-devdeps	7m 37s
	1h 18m 11s

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