[FEAT] Remove duplicate diagnostics from linter

[gnikit]

Is there an existing request for this?

• I have searched the existing issues

Feature Request

There can be instances where the linter (many times erroneously) might raise multiple identical diagnostics. We should be able to remove duplicates. I suspect the solution is not going to be the most performant one but I don't think there is a much better way for arbitrary Objects in JS/TS.