Remove evalbuff and expensivebuff #6036

Job	Run time
build-and-check	3m 16s
test-integration-packages/internal	1m 12s
test-integration-packages/billing	1m 2s
test-integration-cli	44s
test-integration-web	52s
test-integration-packages/agent-runtime	53s
test-integration-sdk	1m 31s
test-.agents	44s
test-common	42s
test-cli	1m 0s
test-web	45s
test-packages/billing	45s
test-sdk	45s
test-packages/agent-runtime	45s
test-integration-common	43s
test-packages/internal	50s
	16m 29s

Provide feedback