Remove scripts that are no longer needed

* remove the show/hide logic for the old mobile menu
* remove base.js as it only imported jquery, which is usually done by
  each script itself if required

invenio_theme_tuw/assets/semantic-ui/js/invenio_theme_tuw/messages/index.js

+/*
+ * This file is part of Invenio.
+ * Copyright (C) 2017-2020 CERN.
+ * Copyright (C) 2021      TU Wien.
+ *
+ * Invenio is free software; you can redistribute it and/or modify it
+ * under the terms of the MIT License; see LICENSE file for more details.
+ */
+
+// eslint-disable-next-line no-unused-vars
+import jquery from "jquery";
+import "semantic-ui-css/semantic.js";
+import "semantic-ui-less/semantic.less";
+
+// Initialize Semantic UI components
+jquery(".ui.dropdown").dropdown();
+jquery(".ui.accordion").accordion();
+
+jquery(".message .close").on("click", function () {
+  jquery(this).closest(".message").transition({
+    animation: "fade",
+    duration: 0,
+    interval: 0,
+  });
+});

invenio_theme_tuw/templates/semantic-ui/invenio_theme_tuw/javascript.html

@@ -7,6 +7,5 @@
   under the terms of the MIT License; see LICENSE file for more details.
 #}
 
-{{ webpack['base.js']}}
-{{ webpack['theme.js']}}
 {{ webpack['i18n_app.js']}}
+{{ webpack['invenio-theme-tuw-messages.js']}}

invenio_theme_tuw/webpack.py

@@ -19,6 +19,7 @@ theme = WebpackThemeBundle(
                 "invenio-theme-tuw-theme": "./less/invenio_theme_tuw/theme.less",
                 "invenio-theme-tuw-tracking": "./js/invenio_theme_tuw/tracking/index.js",
                 "invenio-theme-tuw-mobilemenu": "./js/invenio_theme_tuw/mobilemenu/index.js",
+                "invenio-theme-tuw-messages": "./js/invenio_theme_tuw/messages/index.js",
             },
             "dependencies": {},
         },