Remove outdated step in the workflow

Author: takaram

.github/workflows/ci.yml

@@ -38,11 +38,7 @@ jobs:
  key: php-${{ matrix.php }}-composer-locked-${{ hashFiles('composer.lock') }}
  restore-keys: php-${{ matrix.php }}-composer-locked-
  - name: Install PHP dependencies
- if: matrix.php != '8.1'
  run: composer update ${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-progress --no-suggest
- - name: 'Install PHP dependencies on PHP 8.1 (TODO: remove that)'
- if: matrix.php == '8.1'
- run: composer update --ignore-platform-reqs ${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-progress --no-suggest
  - name: PHPUnit
  run: vendor/bin/phpunit