Should we clean up the few remaining references to Lucene/Solr?

[slow-J]

Description

I was looking at a very old issue for a failing unit test with an ant test command. When I tried to run it in gradle (incorrectly), I was greeted with a message that stood out to me:

This is an experimental Lucene/Solr gradle build.

Searching the Lucene codebase (github search), we find 18 usages of Lucene/Solr, all in comments/readmes/print messages in tools, most of these can be switched to just Lucene

Should we clean this up? If yes, I am happy to do it :)

[dweiss]

Please do, thank you!