After creating a custom menu using the API, the developer can also use the API to delete the custom menu currently in use. Note that calling this API will remove the default menu and all personalized menus when personalizing menus.
Request Description
httpRequest method: GET
https://api.weixin.qq.com/cgi-bin/menu/delete?access_token=ACCESS_TOKEN
Response Description
In correspond to the creation API, the correct Json return result:
{"errcode":0,"errmsg":"ok"}