MC-2371: Implement full width layout for CMS pages

- Update layout to update class of main.content for CMS pages

Author: davemacaulay

app/code/Magento/PageBuilder/view/frontend/page_layout/cms-full-width.xml

@@ -7,4 +7,5 @@
 -->
 <layout xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_layout.xsd">
     <update handle="1column" />
+    <referenceContainer name="main.content" htmlTag="main" htmlClass="page-main-full-width" />
 </layout>

app/code/Magento/PageBuilder/view/frontend/web/css/source/_module.less

@@ -53,8 +53,3 @@
     }
 }
 
-//
-//  Page Layouts
-//  _____________________________________________
-
-@import 'layout/_import.less';