update: remove aliyun repo

composer.json

@@ -65,11 +65,5 @@
         "post-create-project-cmd": [
             "@php artisan key:generate --ansi"
         ]
-    },
-    "repositories": {
-        "packagist": {
-            "type": "composer",
-            "url": "https://mirrors.aliyun.com/composer/"
-        }
     }
 }