Test

Remove `rich` as required for `tree()` #6482

Job	Run time
py=3.11-min_deps	18m 40s
doctests	1m 0s
os=ubuntu-latest, py=3.13, deps=minimal	15m 10s
os=ubuntu-latest, py=3.13, deps=optional	18m 3s
py=3.13-upstream	23m 3s
os=ubuntu-latest, py=3.11, deps=optional	17m 42s
os=ubuntu-latest, py=3.11, deps=minimal	15m 45s
os=ubuntu-latest, py=3.12, deps=optional	17m 38s
os=windows-latest, py=3.13, deps=optional	20m 15s
os=windows-latest, py=3.11, deps=optional	23m 57s
os=ubuntu-latest, py=3.12, deps=minimal	15m 46s
os=macos-latest, py=3.11, deps=optional	16m 43s
os=macos-latest, py=3.13, deps=optional	11m 56s
Test complete	2s
	3h 35m 40s

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