Removes all Amazon saved for later items on the cart page. It will only remove visible items. You might want to scroll first to make more items visible. To use paste code in developer console (Ctrl+Shift+J or Cmd+Opt+J in Chrome) then press enter.

deleteAmazonSavedItems.js

function deleteSavedItems() {
	var query = document.querySelectorAll("#sc-saved-cart input[value=Delete]");
	
	if (query.length) {
		query[0].click();
	}
	
	if (query.length > 1) {
		setTimeout(deleteSavedItems,100);
	}
	else {
		console.log('Finished');
	}
}

deleteSavedItems();