Remove obsolete dependency on ext-json (#1974)

Author: DerManoMann

composer.json

@@ -45,7 +45,6 @@
     },
     "require": {
         "php": ">=8.2",
-        "ext-json": "*",
         "nikic/php-parser": "^4.19 || ^5.0",
         "phpstan/phpdoc-parser": "^2.0",
         "psr/log": "^1.1 || ^2.0 || ^3.0",