chore: remove custom commitlint config

The config was previously used to handle dependabot PRs which are now
handled automatically by upstream.

Author: smlx

.github/commitlint.config.mjs

@@ -27,8 +27,6 @@ jobs:
       with:
         fetch-depth: 0
     - uses: wagoid/commitlint-github-action@7f0a61df502599e1f1f50880aaa7ec1e2c0592f2 # v6.0.1
-      with:
-        configFile: .github/commitlint.config.mjs
   lint-actions:
     permissions:
       contents: read