refactor: remove unused fetchPackageMetadata and fetchPackageManifest… #1924

Job	Run time
list	19s
workflow (modules-builder-tests)	35s
workflow (devkit-core-tests-rerun)	27s
workflow (build-cli)	23s
workflow (build-unit-tests)	37s
workflow (devkit-core-tests)	29s
	2m 50s

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