Do not install prestissimo on CI (#401)

Author: kubawerlos

.github/workflows/ci.yml

@@ -72,9 +72,6 @@ jobs:
  key: ${{ runner.os }}-composer-cache-${{ hashFiles('**/composer.json') }}
  restore-keys: ${{ runner.os }}-composer-cache-
 
- - name: Install prestissimo
- run: composer global outdated --strict hirak/prestissimo || composer global require hirak/prestissimo
-
  - name: Install dependencies
  run: composer update --no-progress --no-suggest ${{ matrix.composer_flags }}