Update pull_request.yml

Author: kenyonj

.github/workflows/pull_request.yml

@@ -15,8 +15,6 @@ jobs:
       with:
         bundler-cache: true
     - name: Build and test with Rake/Rubocop
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
         bundle exec rake
         bundle exec rubocop --display-cop-names