The Theme can show Full Width Layout without the Sidebar. We focused on this with an Red Arrow in our Screenshot. For pages it is possible to use Full Width Templates, too.
Different Themes have different features and functionalists. A Theme may not fulfill all requirements users may have. Then users should search for plugins or customize the Theme for their purposes. There are various plugins which can show specific widgets in specific pages/posts. These are not Theme Issues, right? These are features which may have or many not have in a Theme.
Twenty Fourteen has two sidebars. One is for main layout and one is for contents. The difference is Twenty Fourteen doesn’t show any default WidGets when the Sidebar remains empty. But the space is also occupied by the sidebar. You can also remove the default widgets from Business Line simply replace the whole code of sidebar.php with the following. Thus if you don’t use any WidGets in the Primary Sidebar the Sidebar will be empty.
/* D5 Business Line Pro Theme's Right Sidebar Area
Copyright: 2012-2014, D5 Creation, www.d5creation.com
Based on the Simplest D5 Framework for WordPress
Since D5 Business Line 1.0
<?php dynamic_sidebar( 'sidebar-1' ); dynamic_sidebar( 'sidebar-2' ); ?>