ci: remove composer cache

Author: leeqvip

.github/workflows/phpunit.yml

@@ -47,15 +47,6 @@ jobs:
     - name: Validate composer.json and composer.lock
       run: composer validate --strict
 
-    - name: Cache Composer packages
-      id: composer-cache
-      uses: actions/cache@v3
-      with:
-        path: vendor
-        key: ${{ runner.os }}-php-${{ matrix.php }}-Laravel${{ matrix.laravel }}-${{ hashFiles('**/composer.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-php-${{ matrix.php }}-Laravel${{ matrix.laravel }}
-
     - name: Install dependencies
       run: composer install --prefer-dist --no-progress