Fix unresolved merge conflict in Concurrency composer.json (#55233)

Author: jnoordsij

src/Illuminate/Concurrency/composer.json

@@ -14,19 +14,11 @@
         }
     ],
     "require": {
-<<<<<<< HEAD
         "php": "^8.3",
         "illuminate/console": "^13.0",
         "illuminate/contracts": "^13.0",
         "illuminate/process": "^13.0",
         "illuminate/support": "^13.0",
-=======
-        "php": "^8.2",
-        "illuminate/console": "^12.0",
-        "illuminate/contracts": "^12.0",
-        "illuminate/process": "^12.0",
-        "illuminate/support": "^12.0",
->>>>>>> 12.x
         "laravel/serializable-closure": "^1.3|^2.0"
     },
     "autoload": {