chores: remove unused reference to GITHUB_TOKEN

Author: t-graf

.github/workflows/deploy-documentation.yml

@@ -32,7 +32,6 @@ jobs:
       - name: Deploy 🚀
         uses: JamesIves/github-pages-deploy-action@4.1.3
         with:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BRANCH: gh-pages # The branch the action should deploy to.
           FOLDER: ./docs # The folder the action should deploy.
           CLEAN: true # Automatically remove deleted files from the deploy branch