Yes, your "clean up". Indeed you haven't actually removed the Erlang reference - you'll wait for someone else to notice you've orphaned it. By "pretty worthless" you're twisting some statements that, in itself, it didn't establish notability. The fact, however, that the language has shown influence on a very widely used language (due to its use in telecoms) remains, and there is no constructive reason to remove a mention of this. On the association of a language that combines Semantic Web representations with tuple-spaced computing for coordination, and projects with are funded to develop the large-scale combination of Semantic Web representations with tuple-space computing for coordination, your justification (that you "don't understand the connection"), apart from being absurd, would surely justify putting a request for clarification here on the talk page, not deletion. Is this normal on Wikipedia, do you think? To delete properly cited edits you don't understand".