import { Context } from "https://deno.land/x/grammy@v1.13.1/mod.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
signal: AbortSignalOptional AbortSignal to cancel the request
Official reference: https://core.telegram.org/bots/api#unpinallforumtopicmessages