refactor(@angular/ssr): remove CSR fallback for invalid hosts #3120

Job	Run time
list	22s
workflow (modules-builder-tests)	1m 50s
workflow (build-unit-tests)	2m 28s
workflow (devkit-core-tests-rerun)	1m 25s
workflow (build-cli)	1m 38s
workflow (devkit-core-tests)	1m 22s
	9m 5s

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