samplestyle.css and samplescript.js at plugin root can be removed

[xavortm]

There are CSS and JS folders that are included from the main class, while the JS and CSS files at root level are unused and serve no use. This should clear up the plugin a little more :)

wp_register_script( 'samplescript-admin', plugins_url( '/js/samplescript-admin.js' , __FILE__ ), array('jquery'), '1.0', true );