Test

Remove `rich` as required for `tree()` #6483

Job	Run time
doctests	1m 17s
py=3.11-min_deps	18m 25s
os=ubuntu-latest, py=3.13, deps=optional	18m 17s
os=ubuntu-latest, py=3.12, deps=optional	15m 39s
os=windows-latest, py=3.11, deps=optional	24m 0s
os=ubuntu-latest, py=3.12, deps=minimal	15m 49s
os=ubuntu-latest, py=3.13, deps=minimal	16m 13s
os=windows-latest, py=3.13, deps=optional	21m 4s
py=3.13-upstream	23m 9s
os=macos-latest, py=3.13, deps=optional	11m 21s
os=ubuntu-latest, py=3.11, deps=optional	17m 34s
os=ubuntu-latest, py=3.11, deps=minimal	16m 30s
os=macos-latest, py=3.11, deps=optional	13m 32s
Test complete	3s
	3h 32m 53s

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