import { Context } from "https://dotland.deno.dev/x/grammy@v1.20.2/context.ts";
Context-aware alias for api.unpinAllForumTopicMessages. Use this method to clear the list of pinned messages in a forum topic. The bot must be an administrator in the chat for this to work and must have the can_pin_messages administrator right in the supergroup. Returns True on success.
Parameters
Optional AbortSignal to cancel the request
Official reference: https://core.telegram.org/bots/api#unpinallforumtopicmessages