#163 Remove coveralls

Reason: Everytime there is a year or so between updates, coveralls is broken for one reason or another.

Author: roskakori

.github/workflows/build.yaml

@@ -38,13 +38,6 @@ jobs:
       - name: Run the test suite
         run: |
           poetry run pytest --cov=cutplace --cov-branch
-      - name: Update coveralls
-        if: ${{ matrix.python-version == env.MAIN_PYTHON_VERSION}}
-        env:
-          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          poetry run coveralls
 
   check-style:
     runs-on: ubuntu-latest