Stop bundling clj-kondo in favor of using it through clojure-lsp

[bpringe]

This task is for later, after clojure-lsp integration with Calva is released.

Currently there are a couple small issues with clojure-lsp's diagnostics, and until those are fixed, we'll just keep using the clj-kondo extension.

• https://github.com/snoe/clojure-lsp/issues/199
• False 'unused' diagnostics in rich comments: https://github.com/snoe/clojure-lsp/issues/67#issuecomment-533566148
• Make clojure-lsp diagnostics (not ones from clj-kondo) show clojure-lsp as source: https://github.com/snoe/clojure-lsp/issues/116#issuecomment-738495510

Clojure-lsp, at this time, does offer at least one thing clj-kondo does not (that I can tell), and that is showing unused public variables.

simple in the above is unused in the code base - clojure-lsp tells me this, but clj-kondo does not (only thing providing diagnostics in the above).

[ericdallo]

@bpringe all those issues were fixed :)

[bpringe]

Awesome! Thank you, sir.