remove upload to coverage

```
Using version ^0.1.0 for php-coveralls/php-coveralls
/home/runner/work/_temp/fdd15576-1111-4058-88fa-86864697f633.sh: line 2: vendor/bin/php-coveralls: No such file or directory
```

.github/workflows/tests.yml

@@ -39,11 +39,3 @@ jobs:
 
       - name: Tests
         run: vendor/bin/phpunit --coverage-clover clover.xml
-
-      - name: Upload coverage results to Coveralls
-        if: matrix.analysis
-        env:
-          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          composer require php-coveralls/php-coveralls -n -W
-          vendor/bin/php-coveralls --coverage_clover=clover.xml -v