clean up CollectionType #460

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Run time

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Job	Run time
Static code analysis	1m 36s
GraalVM 21 - oracle_atps	6h 0m 14s
OpenJDK 17 - h2	23m 9s
GraalVM 21 - oracle_db19c	38m 11s
OpenJDK 17 - hsqldb	18m 12s
GraalVM 21 - oracle_db21c	41m 50s
OpenJDK 17 - mysql	30m 16s
GraalVM 21 - oracle_db23c	38m 27s
OpenJDK 17 - mariadb	23m 35s
OpenJDK 17 - postgresql	21m 32s
OpenJDK 17 - edb	21m 27s
OpenJDK 17 - oracle	32m 58s
OpenJDK 17 - db2	45m 39s
OpenJDK 17 - mssql	26m 18s
OpenJDK 17 - sybase	27m 37s
	12h 31m 1s