refactor(@schematics/angular): remove duplicate prompt definition. #8357

Job	Run time
lint	2m 18s
build	3m 51s
e2e_windows (windows-2025, 22, esbuild, 0)	56s
e2e_windows (windows-2025, 22, npm, 4)	46s
e2e_windows (windows-2025, 22, npm, 0)	55s
e2e_windows (windows-2025, 22, npm, 1)	48s
e2e_windows (windows-2025, 22, npm, 3)	1m 39s
e2e_windows (windows-2025, 22, npm, 5)	43s
e2e_windows (windows-2025, 22, esbuild, 4)	50s
e2e_windows (windows-2025, 22, esbuild, 3)	55s
e2e_windows (windows-2025, 22, esbuild, 2)	47s
e2e_windows (windows-2025, 22, esbuild, 1)	55s
e2e_windows (windows-2025, 22, npm, 2)	46s
e2e_windows (windows-2025, 22, esbuild, 5)	46s
publish-snapshots	4m 40s
test	9m 9s
Browser Compatibility Tests	9m 5s
e2e	1s
e2e-snapshots	1s
e2e-package-managers	1s
	39m 52s

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