Remove Bootstrap css reference from static pages

(cherry picked from commit f61879e9)

resources/views/layouts/staticPages.blade.php

@@ -22,7 +22,6 @@
 		<link rel="apple-touch-icon" sizes="152x152" href="/img/apple/touch-icon-152.png">
 		<link rel="apple-touch-icon" sizes="180x180" href="/img/apple/touch-icon-180.png">
 		<link rel="search" type="application/opensearchdescription+xml" title="{{ trans('staticPages.opensearch') }}" href="{{  LaravelLocalization::getLocalizedURL(LaravelLocalization::getCurrentLocale(), action('StartpageController@loadPlugin')) }}">
-		<link type="text/css" rel="stylesheet" href="{{ mix('css/bootstrap.css') }}" />
 		<link type="text/css" rel="stylesheet" href="{{ mix('css/themes/metager.css') }}" />
 		<link type="text/css" rel="stylesheet" href="{{ mix('css/utility.css') }}" />
 		<link href="/fonts/liberationsans/stylesheet.css" rel="stylesheet">