remove unnecessary phpstan plugin

Author: AydinHassan

composer.json

@@ -36,7 +36,6 @@
         "squizlabs/php_codesniffer": "^3.4",
         "symfony/phpunit-bridge": "^5.1",
         "phpstan/phpstan": "^0.12.50",
-        "timeweb/phpstan-enum": "^2.2",
         "phpstan/extension-installer": "^1.0",
         "phpstan/phpstan-symfony": "^0.12.8"
     },