remove: phpunit

Author: darkalchemy

composer.json

@@ -22,7 +22,6 @@
     "overtrue/phplint": "^4.1.0",
     "phpmd/phpmd": "^2.9",
     "phpstan/phpstan": "^1.6.7",
-    "phpunit/phpunit": "^9.5.20",
     "roave/security-advisories": "dev-latest",
     "squizlabs/php_codesniffer": "^3.5",
     "symfony/var-dumper": "^6.0.8"