diff --git a/core/src/main/java/org/teavm/backend/wasm/GtkExample.java b/core/src/main/java/org/teavm/backend/wasm/GtkExample.java
deleted file mode 100644
index daa5db2fb..000000000
--- a/core/src/main/java/org/teavm/backend/wasm/GtkExample.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- *  Copyright 2018 Alexey Andreev.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.teavm.backend.wasm;
-
-import org.teavm.interop.Address;
-import org.teavm.interop.Function;
-import org.teavm.interop.Import;
-import org.teavm.interop.Structure;
-import org.teavm.interop.c.Include;
-
-public final class GtkExample {
-    private GtkExample() {
-    }
-
-    public static void main(String[] args) {
-        Gtk.init(null, null);
-        Gtk.Window window = Gtk.windowNew(Gtk.WINDOW_TOPLEVEL);
-        GLib.signalConnect(window, "delete-event",
-                Function.get(GLib.Callback.class, GtkExample.class, "windowDeleted"), null);
-        GLib.signalConnect(window, "destroy",
-                Function.get(GLib.Callback.class, GtkExample.class, "destroy"), null);
-        Gtk.setBorderWidth(window, 10);
-
-        Gtk.Button button = Gtk.buttonNewWithLabel("Hello, world");
-        GLib.signalConnect(button, "clicked", Function.get(GLib.Callback.class, GtkExample.class, "hello"), null);
-        Gtk.add(window, button);
-        Gtk.show(button);
-
-        Gtk.show(window);
-        Gtk.main();
-    }
-
-    private static void hello(Gtk.Widget widget, Address data) {
-        System.out.println("Hello, world!");
-    }
-
-    private static boolean windowDeleted(Gtk.Widget widget, Address event, Address data) {
-        System.out.println("System event occurred");
-        return false;
-    }
-
-    private static void destroy(Gtk.Widget widget, Address data) {
-        Gtk.mainQuit();
-    }
-
-    @Include("gtk/gtk.h")
-    static class Gtk {
-        static class Widget extends GLib.GObject {
-        }
-
-        static class Window extends Container {
-        }
-
-        static class Container extends Widget {
-        }
-
-        static class Button extends Widget {
-        }
-
-        @Import(name = "gtk_init")
-        static native void init(Address argc, Address argv);
-
-        @Import(name = "gtk_window_new")
-        static native Window windowNew(int type);
-
-        @Import(name = "gtk_widget_show")
-        static native void show(Widget widget);
-
-        @Import(name = "gtk_main")
-        static native void main();
-
-        @Import(name = "gtk_main_quit")
-        static native void mainQuit();
-
-        @Import(name = "gtk_container_set_border_width")
-        static native void setBorderWidth(Container container, int width);
-
-        @Import(name = "gtk_button_new_with_label")
-        static native Button buttonNewWithLabel(String label);
-
-        @Import(name = "gtk_container_add")
-        static native void add(Container container, Widget widget);
-
-        static final int WINDOW_TOPLEVEL = 0;
-        static final int WINDOW_POPUP = 1;
-    }
-
-    static class GLib {
-        static class GObject extends Structure {
-        }
-
-        @Import(name = "g_signal_connect")
-        static native long signalConnect(GObject instance, String signalName, Callback callback, Address data);
-
-        static abstract class Callback extends Function {
-            abstract void call();
-        }
-    }
-}