cleaning framework/sessions folder after every request

As I found my framework/sessions folder becoming bulkier. Because laravel creating session files on every request. I am using laravel 5.1 . I don't want sessions on all requests. or I want to delete framework/sessions files automatically after each request is completed. I tried session->flash. But files are still there.

a:3:{s:6:"_token";s:40:"AXqkhlwBwbJGcfG3l8ZVzN991HQnYwfioQUd38Mz";s:9:"_sf2_meta";a:3:{s:1:"u";i:1487576780;s:1:"c";i:1487576780;s:1:"l";s:1:"0";}s:5:"flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}

via Chebli Mohamed