Remove packaging requirement #1803

Job	Run time
Tox (3, 8, lint)	39s
CWL conformance (v1.0, docker)	4m 27s
Tox (3, 8, unit)	12m 23s
cwltool release test	14m 2s
CWL conformance (v1.0, singularity)	3m 42s
No leftovers	8m 17s
Tox (3, 8, bandit)	29s
CWL conformance (v1.0, podman)	3m 56s
Tox (3, 8, mypy)	13m 1s
CWL conformance (v1.1, docker)	4m 57s
CWL conformance (v1.1, singularity)	8m 5s
Tox (3, 9, lint)	34s
Linters (lintreadme)	1m 2s
build_test_container	13m 38s
Tox (3, 9, unit)	10m 20s
Linters (shellcheck)	22s
CWL conformance (v1.1, podman)	5m 27s
Linters (pydocstyle)	25s
Tox (3, 9, bandit)	31s
Tox (3, 9, mypy)	11m 50s
Test on macos-latest	12m 5s
CWL conformance (v1.2, docker)	6m 32s
Tox (3, 10, lint)	33s
CWL conformance (v1.2, singularity)	9m 45s
Tox (3, 10, unit)	12m 52s
CWL conformance (v1.2, podman)	6m 48s
Tox (3, 10, bandit)	42s
CWL conformance (v1.2, docker, --fast-parser)	6m 28s
Tox (3, 10, mypy)	11m 25s
Tox (3, 11, lint)	36s
Tox (3, 11, unit)	9m 46s
Tox (3, 11, bandit)	30s
Tox (3, 11, mypy)	10m 9s
Tox (3, 12, lint)	57s
Tox (3, 12, unit)	11m 49s
Tox (3, 12, bandit)	54s
Tox (3, 12, mypy)	1m 25s
	3h 41m 23s

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