Remove php-cs-fixer since it is not yet compatible with symfony 6

Author: W0rma

.github/workflows/continuous-integration.yml

@@ -67,18 +67,12 @@ jobs:
           coverage: "none"
           tools: "composer:v2,flex"
 
-      - name: "Cache dependencies installed with composer"
-        uses: "actions/cache@v2"
-        with:
-          path: "~/.composer/cache"
-          key: "php-${{ matrix.php-version }}-composer-locked-${{ hashFiles('composer.lock') }}"
-          restore-keys: "php-${{ matrix.php-version }}-composer-locked-"
-
       - name: "Install dependencies with composer"
         env:
           SYMFONY_REQUIRE: "${{ matrix.symfony-require }}"
         run: |
           composer update --no-interaction --no-progress ${{ matrix.composer-flags }}
+          composer remove friendsofphp/php-cs-fixer --dev
 
       - name: "Run PHPUnit"
         if: "${{ matrix.coverage != '' }}"