Bootstrap licence free template

I´m creating a new website. For that I´m using a free bootstrap template. On top of my index page I have:

 A Design by W3layouts
    Author: W3layout
    Author URL: http://w3layouts.com
    License: Creative Commons Attribution 3.0 Unported
    License URL: http://ift.tt/oKTIFM

Can I delete or change this for my own purpose (in other words change author, License, etc)?

Licence also says:

You are free to:

Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms.

So, can I have any problem in future (which clearly I´m not seeing)?