test.yml in oauth2_api_client-4.0.0

- old
+ new

@@ -13,9 +13,8 @@
     steps:
     - uses: actions/checkout@v1
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
-    - run: gem install bundler
     - run: bundle
     - run: bundle exec rspec
     - run: bundle exec rubocop