diff --git a/ext/mixed/js/hotkey-handler.js b/ext/mixed/js/hotkey-handler.js
index 2de2a8d2..423410b7 100644
--- a/ext/mixed/js/hotkey-handler.js
+++ b/ext/mixed/js/hotkey-handler.js
@@ -169,12 +169,6 @@ class HotkeyHandler extends EventDispatcher {
 
     // Private
 
-    _onMessage({action, params}, sender, callback) {
-        const messageHandler = this._messageHandlers.get(action);
-        if (typeof messageHandler === 'undefined') { return false; }
-        return yomichan.invokeMessageHandler(messageHandler, params, callback, sender);
-    }
-
     _onKeyDown(e) {
         const key = e.code;
         const hotkeyInfo = this._hotkeys.get(key);