Getting the following when trying to install a managed package which has quick action which implements force:lightningQuickActionWithoutHeader interface.

You can only create Lightning Component Quick Actions for Component Bundles containing a component that implements force:lightningQuickAction and has no required attributes without a default value.

Is there any solution for this?? 
 

Is there any way to remove save and cancel shown in the modal popupof lightning screen?. Ive created a custom button and added to the contact. I'd prefer using the send button in visual force page rather than button present in the modal popup which shows up by default.