Update config.yml

Drop the `install pre-commit` step here, as it is installed for all linting ci via the tox env deps

Author: pacrob

.circleci/config.yml

@@ -25,9 +25,6 @@ common: &common
         command: |
           python -m pip install --upgrade pip
           python -m pip install tox
-    - run:
-        name: install pre-commit
-        command: python -m pip install --progress-bar=off pre-commit
     - run:
         name: run tox
         command: python -m tox run -r