refactor(telegram): remove unused webhook callback helper (#27816)

src/telegram/bot.create-telegram-bot.test-harness.ts

@@ -169,7 +169,6 @@ vi.mock("grammy", () => ({
     }
   },
   InputFile: class {},
-  webhookCallback: vi.fn(),
 }));
 
 const sequentializeMiddleware = vi.fn();

src/telegram/bot.ts

@@ -1,7 +1,7 @@
 import { sequentialize } from "@grammyjs/runner";
 import { apiThrottler } from "@grammyjs/transformer-throttler";
 import type { ApiClientOptions } from "grammy";
-import { Bot, webhookCallback } from "grammy";
+import { Bot } from "grammy";
 import { resolveDefaultAgentId } from "../agents/agent-scope.js";
 import { resolveTextChunkLimit } from "../auto-reply/chunk.js";
 import { DEFAULT_GROUP_HISTORY_LIMIT, type HistoryEntry } from "../auto-reply/reply/history.js";
@@ -381,7 +381,3 @@ export function createTelegramBot(opts: TelegramBotOptions) {
 
   return bot;
 }
-
-export function createTelegramWebhookCallback(bot: Bot, path = "/telegram-webhook") {
-  return { path, handler: webhookCallback(bot, "http") };
-}

src/telegram/monitor.test.ts

@@ -163,7 +163,6 @@ vi.mock("./bot.js", () => ({
       start: vi.fn(),
     };
   },
-  createTelegramWebhookCallback: vi.fn(),
 }));
 
 // Mock the grammyjs/runner to resolve immediately