Last commit broke gulp - boo

Author: Matt Gaunt

src/styles/core.scss

@@ -19,7 +19,6 @@
 @import 'core/_core';
 @import 'core/_dialog';
 @import 'core/_side-nav';
-@import 'core/_new-appshelling';
 @import 'core/_main';
 @import 'core/_header';
 @import 'core/_loader';