remove tests/ platform-override php version

Author: staabm

tests/composer.json

@@ -3,10 +3,5 @@
     "require-dev": {
         "phpunit/phpunit": "^11.5.23",
         "brianium/paratest": "^7.8.3"
-    },
-	"config": {
-		"platform": {
-			"php": "8.2.99"
-		}
-	}
+    }
 }