Replace jquery gems with cdn links

Gemfile

@@ -20,8 +20,6 @@ gem 'geocoder'
 gem 'haml-rails'
 gem 'has_scope'
 gem 'inherited_resources'
-gem 'jquery-rails'
-gem 'jquery-ui-rails'
 gem 'kaminari'
 gem 'kt-paperclip'
 gem 'paper_trail'

Gemfile.lock

@@ -224,12 +224,6 @@ GEM
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     jmespath (1.6.2)
-    jquery-rails (4.6.0)
-      rails-dom-testing (>= 1, < 3)
-      railties (>= 4.2.0)
-      thor (>= 0.14, < 2.0)
-    jquery-ui-rails (7.0.0)
-      railties (>= 3.2.16)
     json (2.7.4)
     kaminari (1.2.2)
       activesupport (>= 4.1.0)
@@ -540,8 +534,6 @@ DEPENDENCIES
   haml-rails
   has_scope
   inherited_resources
-  jquery-rails
-  jquery-ui-rails
   kaminari
   kt-paperclip
   launchy

app/assets/javascripts/application.js.erb

@@ -1,7 +1,3 @@
-//= require jquery
-//= require jquery_ujs
-//= require jquery-ui
-
 var map;
 var region;
 var ismap;

app/assets/stylesheets/application.scss.erb

@@ -1,7 +1,3 @@
-/*
- *= require jquery-ui
- */
-
 :root {
   --red: #fe46b0;
   --lightpink: #fff1f1;

app/views/layouts/application.html.haml

@@ -16,10 +16,10 @@
     - if Rails.env.staging?
       %meta{content: "noindex,nofollow", name: "robots"}/
 
-    = stylesheet_link_tag 'normalize', 'application', 'mediaqueries', :media => ""
+    = stylesheet_link_tag 'normalize', 'https://code.jquery.com/ui/1.14.1/themes/base/jquery-ui.css', 'application', 'mediaqueries', :media => ""
     - if mobile_device?
       = stylesheet_link_tag 'mobile-application'
-    = javascript_include_tag 'application'
+    = javascript_include_tag 'https://code.jquery.com/jquery-3.7.1.min.js', 'https://cdn.jsdelivr.net/npm/[email protected]/src/rails.min.js', 'https://code.jquery.com/ui/1.14.1/jquery-ui.min.js', 'application'
     - if current_page?(saved_path) || current_page?(map_path) || current_page?(operators_path) || ((defined? @region) and current_page?(region_homepage_path))
       = stylesheet_link_tag 'lightbox', 'https://unpkg.com/[email protected]/dist/maplibre-gl.css'
       = javascript_include_tag 'lightbox.min', 'https://unpkg.com/[email protected]/dist/maplibre-gl.js', 'https://unpkg.com/[email protected]/dist/pmtiles.js', 'map_style', 'map_style_dark'

app/views/locations/_locations.html.haml

@@ -60,7 +60,7 @@
     $('meta[property="og:description"]').attr("content", "#{desc_for_path(request.path, @region)}");
   }
 
-  let topbutton = document.getElementById("top_button");
+  var topbutton = document.getElementById("top_button");
   window.onscroll = function() {scrollFunction()};
 
   function scrollFunction() {