test: remove dead CLI test code (#491) #6041

Job	Run time
build-and-check	3m 12s
test-integration-packages/internal	1m 11s
test-integration-cli	49s
test-integration-common	44s
test-integration-web	40s
test-integration-sdk	1m 29s
test-integration-packages/billing	1m 12s
test-integration-packages/agent-runtime	44s
test-packages/internal	50s
test-cli	51s
test-packages/agent-runtime	50s
test-web	56s
test-.agents	51s
test-sdk	47s
test-packages/billing	44s
test-common	42s
	16m 32s

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