refactor(@schematics/angular): remove manual install task in library … #716

Job	Run time
list	25s
workflow (devkit-core-tests-rerun)	31s
workflow (devkit-core-tests)	32s
workflow (modules-builder-tests)	27s
workflow (build-cli)	38s
workflow (build-unit-tests)	42s
	3m 15s

Provide feedback