I wish to delete the Introduction which doesn't serve much purpose and begin with Chapter one of the story.
Do i need to make the edits to the current book or can I submit a fresh copy without Introduction and then request Amzon KDP to withdraw the earlier version?
You not only CAN delete the intro--you probably SHOULD! Digital books are not the same as print editions, and it is tedious beyond belief to have to page through copyright information, dedication, acknowledgments, preface, introduction, etc etc before getting to the meat. Plus you're wasting the great platform that Look Inside makes available to you, probably the best sales tool that you have.
You might consider recasting the Intro as a Postscript and putting it at the end of the book, which will increase the amount of your book that is visible on Look Inside.