Remove defunct custos services #37427

Job	Run time
build-client / build-client	4m 20s
setup-selenium / setup_chromedriver	6s
Test (3.9, 0)	43m 28s
Test (3.9, 2)	50m 2s
Test (3.9, 1)	50m 11s
	2h 28m 7s

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