Remove Git Leftovers from Contributing

Author: sampoder

CONTRIBUTING.md

@@ -29,4 +29,3 @@ When making pull requests to the repository, make sure to follow these guideline
 - In your PR's description, link to any related issues or pull requests to give reviewers the full context of your change.
 - For commit messages, follow the [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) format.
   - For example, if you update documentation for a specific extension, your commit message might be: `docs(extension-name) updated installation documentation`.
-diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md