fix demo for stage module

Signed-off-by: Nlongwei <longwei27@huawei.com>
Change-Id: I74de32b636b42c2e22d5b440ef2b05b0510ff098

zh-cn/application-dev/quick-start/stage-structure.md

@@ -99,50 +99,6 @@ module.json示例:
                 "resource": "$profile:config_file2"
             }
         ],
-        "metadata": [
-            {
-                "name": "string",
-                "value": "string",
-                "resource": "$profile:config_file1"
-            },
-            {
-                "name": "string",
-                "value": "string",
-                "resource": "$profile:config_file2"
-            }
-        ],
-        "abilities": [
-            {
-                "name": "MainAbility",
-                "srcEntrance" : "./login/MyMainAbility.ts",
-                "description": "$string:description_main_ability",
-                "icon": "$media:icon",
-                "label": "HiMusic",
-                "visible": true,
-                "skills": [
-                    {
-                        "actions": [
-                            "action.system.home"
-                        ],
-                        "entities": [
-                            "entity.system.home"
-                        ],
-                        "uris": [ ]
-                    }
-                ],
-                "backgroundModes": [
-                    "dataTransfer",
-                    "audioPlayback",
-                    "audioRecording",
-                    "location",
-                    "bluetoothInteraction",
-                    "multiDeviceConnection",
-                    "wifiInteraction",
-                    "voip",
-                    "taskKeeping"
-                ],
-            }
-        ],
         "abilities": [
             {
                 "name": "MainAbility",