Revert "discrete pluralizer for lib.esnext.temporal unit unions" #35438

Job	Run time
lint	55s
coverage	10m 41s
knip	37s
browser-integration	1m 26s
baselines	9m 15s
self-check	59s
typecheck	46s
misc	29s
Test Node 24 on ubuntu-latest	8m 29s
package-size	1m 29s
Test Node lts/* on ubuntu-latest with --no-bundle	11m 9s
Test Node 14 on ubuntu-latest	12m 4s
smoke	54s
Test Node 24 on windows-latest	10m 12s
Test Node 14 on windows-latest	14m 33s
format	34s
required	4s
	1h 24m 36s

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