Remove catboost #3604

Job	Run time
build-docs	2m 4s
test (ubuntu-latest, builder, 3.10)	3m 21s
test (ubuntu-latest, cli, 3.10)	2m 41s
test (ubuntu-latest, client, 3.10)	2m 39s
test (ubuntu-latest, machine, 3.10)	5m 26s
test (ubuntu-latest, reporters, 3.10)	3m 6s
test (ubuntu-latest, serializer, 3.10)	3m 14s
test (ubuntu-latest, server, 3.10)	2m 50s
test (ubuntu-latest, util, 3.10)	15m 51s
test (ubuntu-latest, workflow, 3.10)	2m 39s
test (ubuntu-latest, formatting, 3.10)	2m 20s
test (ubuntu-latest, allelse, 3.10)	3m 34s
test (ubuntu-latest, docker, 3.10)	4m 0s
	53m 45s

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