Load bootstrap css from own domain

themes/beautifulhugo/layouts/partials/head.html

@@ -33,19 +33,16 @@
   <meta property="og:url" content="{{ .URL | absLangURL }}" />
   <meta property="og:type" content="website" />
   <meta property="og:site_name" content="{{ .Site.Title }}" />
-<!-- Hugo Version number -->
-  {{ .Hugo.Generator -}}
 <!-- Links and stylesheets -->
   <link rel="canonical" href="{{ .URL | absLangURL }}" />
   <link rel="alternate" href="{{ "index.xml" | absLangURL }}" type="application/rss+xml" title="{{ .Site.Title }}">
   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.7.1/katex.min.css" integrity="sha384-wITovz90syo1dJWVh32uuETPVEtGigN07tkttEqPv+uR2SE/mbQcG7ATL28aI9H0" crossorigin="anonymous">
   <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css" integrity="sha384-DNOHZ68U8hZfKXOrtjWvjxusGo9WQnrNx2sqG0tfsghAvtVlRW3tvkXWZh58N9jp" crossorigin="anonymous">
-  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
+  <link rel="stylesheet" href="{{ "css/bootstrap.min.css" | absURL }}" />
   <link rel="stylesheet" href="{{ "css/main.css" | absURL }}" />
   <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lora:400,700,400italic,700italic" />
   <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" />
   <link rel="stylesheet" href="{{ "css/pygment_highlights.css" | absURL }}" />
   <link rel="stylesheet" href="{{ "css/highlight.min.css" | absURL }}" />
 {{- partial "head_custom.html" . }}
-{{ template "_internal/google_analytics_async.html" . }}
 </head>