Remove manually-written composer.json.

composer.json

-{
-  "name": "drupal/entityqueue",
-  "description": "The Entityqueue module allows users to create queues of any entity type.",
-  "type": "drupal-module",
-  "license": "GPL-2.0-or-later",
-  "homepage": "https://www.drupal.org/project/entityqueue",
-  "minimum-stability": "dev",
-  "authors": [
-    {
-      "name": "Andrei Mateescu",
-      "homepage": "https://www.drupal.org/u/amateescu",
-      "role": "Maintainer"
-    },
-    {
-      "name": "Jonathan Jordan",
-      "homepage": "https://www.drupal.org/u/jojonaloha",
-      "role": "Maintainer"
-    }
-  ],
-  "support": {
-    "issues": "https://www.drupal.org/project/issues/entityqueue",
-    "irc": "irc://irc.freenode.org/drupal-contribute",
-    "source": "http://cgit.drupalcode.org/entityqueue"
-  },
-  "require": {
-    "drupal/core": "^8.7.7 || ^9"
-  }
-}