No need for extra doctrine dependency

Author: ulftietze

lib/internal/Magento/Framework/MessageQueue/composer.json

@@ -11,8 +11,7 @@
     ],
     "require": {
         "magento/framework": "*",
-        "php": "~7.1.3||~7.2.0||~7.3.0",
-        "doctrine/instantiator": "^1.0"
+        "php": "~7.1.3||~7.2.0||~7.3.0"
     },
     "autoload": {
         "psr-4": {