Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/3015
@mattyb149 @joewitt Removed the following as compile dependencies because I
can't see any valid use for them in our scripting scenarios:
* groovy-cli*
* groovy-groovydoc
* groovy-docgenerator
* groovy-swing
* groovy-test
* groovy-test-junit5
* groovy-testng
Think that's it. We might want to release an unofficial test build of NiFi
w/ 2.5.X because I'm not 100% sure there's a full guarantee of compatibility
between 2.4 and 2.5
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