Removing diff from flake8 lint CI

.github/workflows/python-ci.yml

@@ -13,9 +13,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-        with:
-          # This is a bit heavy handed, but we need `origin/main` to get a ref to diff against
-          fetch-depth: 0
 
       - name: Setup Python
         uses: actions/setup-python@v3
@@ -29,5 +26,4 @@ jobs:
 
       - name: Run Flake8 Lint
         run: |
-          DIFF="$(git --no-pager diff -u $(git merge-base HEAD origin/main) -- '**/*.py')"
-          echo "$DIFF" | flake8 --diff
+          flake8