diff --git a/src/gateway/test-helpers.mocks.ts b/src/gateway/test-helpers.mocks.ts
index 9674cab0c09..72883798c85 100644
--- a/src/gateway/test-helpers.mocks.ts
+++ b/src/gateway/test-helpers.mocks.ts
@@ -327,14 +327,5 @@ vi.mock("../plugins/loader.js", async () => {
     loadOpenClawPlugins: () => getTestPluginRegistry(),
   };
 });
-vi.mock("../plugins/runtime/runtime-web-channel-plugin.js", () => ({
-  sendWebChannelMessage: (...args: unknown[]) =>
-    (gatewayTestHoisted.sendWhatsAppMock as (...args: unknown[]) => unknown)(...args),
-}));
-vi.mock("/src/plugins/runtime/runtime-web-channel-plugin.js", () => ({
-  sendWebChannelMessage: (...args: unknown[]) =>
-    (gatewayTestHoisted.sendWhatsAppMock as (...args: unknown[]) => unknown)(...args),
-}));
-
 process.env.OPENCLAW_SKIP_CHANNELS = "1";
 process.env.OPENCLAW_SKIP_CRON = "1";
diff --git a/src/plugins/runtime/runtime-web-channel-plugin.ts b/src/plugins/runtime/runtime-web-channel-plugin.ts
index fc916a2b299..cf5026ffc0a 100644
--- a/src/plugins/runtime/runtime-web-channel-plugin.ts
+++ b/src/plugins/runtime/runtime-web-channel-plugin.ts
@@ -1,5 +1,4 @@
 // Runtime web-channel plugin helpers expose web-channel tools through activated plugin runtimes.
-import type { OpenClawConfig } from "../../config/types.openclaw.js";
 import {
   getDefaultLocalRoots as getDefaultLocalRootsImpl,
   loadWebMedia as loadWebMediaImpl,
@@ -60,23 +59,6 @@ type WebChannelHeavyRuntimeModule = {
     runtime?: unknown,
     accountId?: string,
   ) => Promise<void>;
-  sendMessageWhatsApp: (
-    to: string,
-    body: string,
-    options: {
-      verbose: boolean;
-      cfg?: OpenClawConfig;
-      mediaUrl?: string;
-      mediaAccess?: {
-        localRoots?: readonly string[];
-        readFile?: (filePath: string) => Promise<Buffer>;
-      };
-      mediaLocalRoots?: readonly string[];
-      mediaReadFile?: (filePath: string) => Promise<Buffer>;
-      gifPlayback?: boolean;
-      accountId?: string;
-    },
-  ) => Promise<{ messageId: string; toJid: string }>;
   monitorWebChannel: (...args: unknown[]) => Promise<unknown>;
   monitorWebInbox: (...args: unknown[]) => Promise<unknown>;
   startWebLoginWithQr: (...args: unknown[]) => Promise<unknown>;
@@ -234,13 +216,6 @@ export function webAuthExists(
   return getLightExport("webAuthExists")(...args);
 }
 
-/** Sends a web-channel message through the heavy runtime API. */
-export function sendWebChannelMessage(
-  ...args: Parameters<WebChannelHeavyRuntimeModule["sendMessageWhatsApp"]>
-): ReturnType<WebChannelHeavyRuntimeModule["sendMessageWhatsApp"]> {
-  return loadWebChannelHeavyModule().then((loaded) => loaded.sendMessageWhatsApp(...args));
-}
-
 /** Formats a web-channel runtime error through the light runtime API. */
 export function formatError(
   ...args: Parameters<WebChannelLightRuntimeModule["formatError"]>