Remove unnecessary code in the stop method.

lib/units/device/plugins/forward.js

@@ -63,9 +63,8 @@ module.exports = syrup.serial()
           this.dest.pipe(src)
 
           this.stop = function() {
-            //this.dest.unpipe(this.src)
             this.dest.end()
-          }.bind(this)
+          }
         }
 
         conn.pipe(new forwardutil.ForwardParser())