Unfortunately it is not possible to remove it, you can only hide it with CSS. Go to Settings / Advanced customization (CSS) and enter the code above into the editor (left part of the screen). Or let me know and I will do this for you.
We do not provide any technical support for Dreamweaver or any other third-party tools. WA does not require you to work with CSS, it simply gives you ability to do customization and as we state CSS customization requires professional knowledge of HTML and CSS.
Denys Zlobin
Helpful Apricot
http://www.wildapricot.com