change phpstan action

Author: cesargb

.github/workflows/phpstan.yml

@@ -26,10 +26,5 @@ jobs:
     - name: Install composer dependencies
       uses: ramsey/composer-install@v3
 
-    - name: Install larastan
-      run: |
-        composer require "larastan/larastan" --no-interaction --no-update
-        composer update --prefer-dist --no-interaction
-
     - name: Run analyse phpstan
       run: vendor/bin/phpstan analyse --error-format github