Remove external codeowners #985

Job	Run time
initialize	6s
build_sdist (ubuntu-22.04, 3.9)	37s
lint (ubuntu-22.04, 3.9)	34s
build (ubuntu-22.04, 3.8, cp38, false)	9m 1s
build (ubuntu-22.04, 3.9, cp39, false)	9m 17s
build (ubuntu-22.04, 3.10, cp310, false)	9m 6s
build (ubuntu-22.04, 3.11, cp311, false)	8m 58s
build (ubuntu-22.04, 3.12, cp312, false)	9m 8s
build (macos-14, 3.11, cp311, false)	4m 56s
build (macos-14, 3.12, cp312, false)	5m 18s
build (windows-2019, 3.12, cp312, false)	17m 47s
test_sdist	0s
test_dependencies (ubuntu-20.04, 3.9, sqlalchemy>=2)	1m 22s
test (ubuntu-22.04, 3.8, false)	2m 15s
test_dependencies (ubuntu-20.04, 3.9, sqlalchemy<2)	1m 27s
test (ubuntu-22.04, 3.9, false)	2m 26s
test (ubuntu-22.04, 3.10, false)	1m 58s
test_dependencies (ubuntu-20.04, 3.9, numpy==1.19.5)	56s
test (ubuntu-22.04, 3.11, false)	2m 1s
test (ubuntu-22.04, 3.12, false)	2m 9s
test (macos-14, 3.11, false)	2m 45s
test (macos-14, 3.12, false)	2m 51s
test (windows-2019, 3.12, false)	6m 14s
publish_release_artifacts	0s
	1h 41m 12s

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