Test

Remove `rich` as required for `tree()` #6469

Job	Run time
py=3.13-upstream	22m 32s
os=ubuntu-latest, py=3.12, deps=minimal	15m 58s
os=ubuntu-latest, py=3.11, deps=minimal	14m 31s
py=3.11-min_deps	19m 13s
os=macos-latest, py=3.13, deps=optional	11m 11s
os=ubuntu-latest, py=3.13, deps=optional	16m 30s
os=ubuntu-latest, py=3.13, deps=minimal	14m 58s
os=ubuntu-latest, py=3.11, deps=optional	17m 33s
os=macos-latest, py=3.11, deps=optional	13m 6s
os=windows-latest, py=3.13, deps=optional	21m 46s
os=ubuntu-latest, py=3.12, deps=optional	17m 13s
os=windows-latest, py=3.11, deps=optional	22m 2s
doctests	1m 5s
Test complete	3s
	3h 27m 41s

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