fix(ci): don't need extra fetch

Author: paulswartz

.github/workflows/tests.yml

@@ -79,7 +79,6 @@ jobs:
       with:
         fetch-depth: 0 # needs all data to compare with `main` branch
     - uses: ./.github/actions/setup-all
-    - run: git fetch origin main:main
     - run: npm run ci:lint:ex
 
   elixir_unit: