diff --git a/shell/platform/linux/fl_binary_messenger.cc b/shell/platform/linux/fl_binary_messenger.cc
index 52024a25c73fb..63e42f71b36b5 100644
--- a/shell/platform/linux/fl_binary_messenger.cc
+++ b/shell/platform/linux/fl_binary_messenger.cc
@@ -226,13 +226,7 @@ static void set_message_handler_on_channel(
   }
 }
 
-static gboolean has_message_handler_on_channel(FlBinaryMessenger* messenger,
-                                               const gchar* channel) {
-  FlBinaryMessengerImpl* self = FL_BINARY_MESSENGER_IMPL(messenger);
-  return g_hash_table_contains(self->platform_message_handlers, channel);
-}
-
-gboolean do_unref(gpointer value) {
+static gboolean do_unref(gpointer value) {
   g_object_unref(value);
   return G_SOURCE_REMOVE;
 }
@@ -328,7 +322,6 @@ static void fl_binary_messenger_impl_class_init(
 static void fl_binary_messenger_impl_iface_init(
     FlBinaryMessengerInterface* iface) {
   iface->set_message_handler_on_channel = set_message_handler_on_channel;
-  iface->has_message_handler_on_channel = has_message_handler_on_channel;
   iface->send_response = send_response;
   iface->send_on_channel = send_on_channel;
   iface->send_on_channel_finish = send_on_channel_finish;
@@ -370,16 +363,6 @@ G_MODULE_EXPORT void fl_binary_messenger_set_message_handler_on_channel(
       self, channel, handler, user_data, destroy_notify);
 }
 
-G_MODULE_EXPORT gboolean
-fl_binary_messenger_has_message_handler_on_channel(FlBinaryMessenger* self,
-                                                   const gchar* channel) {
-  g_return_val_if_fail(FL_IS_BINARY_MESSENGER(self), FALSE);
-  g_return_val_if_fail(channel != nullptr, FALSE);
-
-  return FL_BINARY_MESSENGER_GET_IFACE(self)->has_message_handler_on_channel(
-      self, channel);
-}
-
 // Note: This function can be called from any thread.
 G_MODULE_EXPORT gboolean fl_binary_messenger_send_response(
     FlBinaryMessenger* self,
diff --git a/shell/platform/linux/fl_binary_messenger_private.h b/shell/platform/linux/fl_binary_messenger_private.h
index fec30f1ae1ed3..ce70c51dc61c6 100644
--- a/shell/platform/linux/fl_binary_messenger_private.h
+++ b/shell/platform/linux/fl_binary_messenger_private.h
@@ -22,10 +22,6 @@ G_BEGIN_DECLS
  */
 FlBinaryMessenger* fl_binary_messenger_new(FlEngine* engine);
 
-gboolean fl_binary_messenger_has_message_handler_on_channel(
-    FlBinaryMessenger* messenger,
-    const gchar* channel);
-
 G_END_DECLS
 
 #endif  // FLUTTER_SHELL_PLATFORM_LINUX_FL_BINARY_MESSENGER_PRIVATE_H_
diff --git a/shell/platform/linux/fl_binary_messenger_test.cc b/shell/platform/linux/fl_binary_messenger_test.cc
index 44bfa232715ad..a95ed318ae6fc 100644
--- a/shell/platform/linux/fl_binary_messenger_test.cc
+++ b/shell/platform/linux/fl_binary_messenger_test.cc
@@ -461,20 +461,21 @@ TEST(FlBinaryMessengerTest, RespondOnBackgroundThread) {
   g_main_loop_run(loop);
 }
 
+static void kill_handler_notify_cb(gpointer was_called) {
+  *static_cast<gboolean*>(was_called) = TRUE;
+}
+
 TEST(FlBinaryMessengerTest, DeletingEngineClearsHandlers) {
   FlEngine* engine = make_mock_engine();
   g_autoptr(FlBinaryMessenger) messenger = fl_binary_messenger_new(engine);
+  gboolean was_killed = FALSE;
 
   // Listen for messages from the engine.
-  fl_binary_messenger_set_message_handler_on_channel(
-      messenger, "test/messages", message_cb, nullptr, nullptr);
-
-  ASSERT_TRUE(fl_binary_messenger_has_message_handler_on_channel(
-      messenger, "test/messages"));
+  fl_binary_messenger_set_message_handler_on_channel(messenger, "test/messages",
+                                                     message_cb, &was_killed,
+                                                     kill_handler_notify_cb);
 
-  g_object_unref(engine);
-  engine = nullptr;
+  g_clear_object(&engine);
 
-  ASSERT_FALSE(fl_binary_messenger_has_message_handler_on_channel(
-      messenger, "test/messages"));
+  ASSERT_TRUE(was_killed);
 }
diff --git a/shell/platform/linux/public/flutter_linux/fl_binary_messenger.h b/shell/platform/linux/public/flutter_linux/fl_binary_messenger.h
index 7f94551afdad7..0fa7d9980fc44 100644
--- a/shell/platform/linux/public/flutter_linux/fl_binary_messenger.h
+++ b/shell/platform/linux/public/flutter_linux/fl_binary_messenger.h
@@ -73,9 +73,6 @@ struct _FlBinaryMessengerInterface {
       gpointer user_data,
       GDestroyNotify destroy_notify);
 
-  gboolean (*has_message_handler_on_channel)(FlBinaryMessenger* messenger,
-                                             const gchar* channel);
-
   gboolean (*send_response)(FlBinaryMessenger* messenger,
                             FlBinaryMessengerResponseHandle* response_handle,
                             GBytes* response,