(Reuters) - Grubhub Inc said on Thursday there is no sale process, denying reports that the online food delivery company was considering strategic options that include a possible sale or an acquisition, sending its shares down 6.7% in extended trading."We felt it was important to clarify that there is unequivocally no process in place to sell the company and there are currently no plans to do so," a Grubhub spokesperson said, in am emailed statement to Reuters.The New York Post reported..