Remove unused code.

main/inc/lib/chamilo_session.class.php

@@ -92,9 +92,6 @@ class ChamiloSession extends System\Session
         ini_set('session.use_trans_sid', 0);
 
         session_name(self::NAME);
-        // read_and_close option improve page load speed see:
-        // http://php.net/manual/en/migration70.new-features.php#migration70.new-features.session-options
-        //session_start([ 'read_and_close' => true]);
         session_start();
         $session = self::instance();
         if ($already_installed) {
@@ -105,9 +102,6 @@ class ChamiloSession extends System\Session
             }
         }
 
-        /*if (!$session->has('starttime') && !$session->is_expired()) {
-            $session->write('starttime', time());
-        }*/
         // If the session time has expired, refresh the starttime value,
         //  so we're starting to count down from a later time
         if (self::has('starttime') && $session->is_expired()) {