Remove make target that does not exist from CONTRIBUTING.md #3274

Job	Run time
Lint pkg	43s
prerequisites	3m 54s
go-tests	7m 50s
test_templates	4m 31s
test_integrations (stack-reference)	2m 20s
examples (aws-java-eks-minimal)	3m 19s
test_integrations (stack-transformation)	2m 13s
examples (aws-java-webserver)	2m 44s
test_integrations (adopt-into-component)	2m 6s
examples (aws-native-java-s3-folder)	3m 14s
test_integrations (rename)	2m 10s
examples (azure-java-appservice-sql)	2m 43s
test_integrations (rename-component)	2m 19s
examples (azure-java-static-website)	2m 41s
test_integrations (rename-component-and-child)	2m 13s
examples (gcp-java-gke-hello-world)	2m 59s
test_integrations (retype-component)	2m 13s
examples (kubernetes)	2m 26s
test_integrations (retype-parents)	2m 17s
examples (minimal)	2m 55s
examples (minimalsbt)	2m 53s
examples (random)	2m 59s
	1h 3m 42s

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