[fix] simple theme: remove static files no longer needed

remove:

    searx/static/themes/simple/js/searxng.js
    searx/static/themes/simple/js/searxng.head.js
    searx/static/themes/simple/css/searxng-rtl.css
    searx/static/themes/simple/css/searxng.css

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/static/themes/simple/gruntfile.js

@@ -92,7 +92,7 @@ module.exports = function(grunt) {
       },
       dist: {
         files: {
-          'js/searxng.head.min.js': ['js/searxng.head.js'],
+          'js/searxng.head.min.js': ['src/js/head/*.js'],
           'js/searxng.min.js': [
             'src/js/main/*.js',
             '../__common__/js/*.js',

searx/static/themes/simple/js/searxng.head.js

@@ -1,40 +0,0 @@
-/**
- * @license
- * (C) Copyright Contributors to the SearXNG project.
- * (C) Copyright Contributors to the searx project (2014 - 2021).
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-/* global DocumentTouch:readonly */
-(function(w, d) {
-    'use strict';
-
-    // add data- properties
-    var script = d.currentScript  || (function() {
-        var scripts = d.getElementsByTagName('script');
-        return scripts[scripts.length - 1];
-    })();
-
-    // try to detect touch screen
-    w.searxng = {
-        touch: (("ontouchstart" in w) || w.DocumentTouch && document instanceof DocumentTouch) || false,
-        method: script.getAttribute('data-method'),
-        autocompleter: script.getAttribute('data-autocompleter') === 'true',
-        search_on_category_select: script.getAttribute('data-search-on-category-select') === 'true',
-        infinite_scroll: script.getAttribute('data-infinite-scroll') === 'true',
-        hotkeys: script.getAttribute('data-hotkeys') === 'true',
-        static_path: script.getAttribute('data-static-path'),
-        translations: JSON.parse(script.getAttribute('data-translations')),
-        theme : {
-            // image that is displayed if load of <img src='...'> failed
-            img_load_error: 'img/img_load_error.svg'
-        }
-    };
-
-    // update the css
-    var hmtlElement = d.getElementsByTagName("html")[0];
-    hmtlElement.classList.remove('no-js');
-    hmtlElement.classList.add('js');
-    if (w.searxng.touch) {
-        hmtlElement.classList.add('touch');
-    }
-})(window, document);