removes `github_repository_project` references #53

Job	Run time
docs (./examples/basic)	9s
docs (./examples/branch_protection)	6s
docs (./examples/complex)	5s
docs (./examples/deploy_keys)	10s
docs (./examples/files)	10s
docs (./examples/issue_labels)	5s
docs (./examples/pages)	9s
docs (./examples/template)	6s
docs (./examples/webhook)	9s
	1m 9s

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