Eliminate legacy interface and obsolete large_data option #1236

Job	Run time
check_commit	10s
ubuntu-latest, black	20s
ubuntu-latest, py38-test	1m 27s
ubuntu-latest, py310-test-cov	1m 45s
windows-latest, py310-test	3m 24s
macos-latest, py310-test	2m 23s
ubuntu-latest, py310-test-alldeps-cov	2m 53s
ubuntu-latest, py38-test-astropy4-cov	1m 29s
ubuntu-latest, py310-test-astropy5	1m 52s
ubuntu-latest, py310-test-devdeps	2m 57s
	18m 40s

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