Remove LegacyTitledEnumSchema API #2093

Job	Run time
build (ubuntu-latest, Debug)	5m 31s
build (windows-latest, Debug)	9m 30s
build (windows-latest, Release)	10m 21s
build (ubuntu-latest, Release)	5m 37s
build (macos-latest, Release)	4m 7s
build (macos-latest, Debug)	13m 19s
publish-coverage	-1s
	48m 24s

Provide feedback