If your project is using Responsive Template, you can remove the login block in Step 3 -> WYSIWYG of the every page, hit "Layout", then move the login block to "Available block", save. You'll need to do this page by page.

*If your project was created with Responsive Template since RVsitebuilder 5.2 , and got updated to RVsitebuilder 5.4. You will be with the Old WYSIWYG.

In Step 3 -> Page Editor, you need to put mouse on content area first, in order to open function "Layout Template" to open and edit.

If you use the Normal Template, you can remove the login block in Step 3 -> User -> User Configuration -> uncheck the Login Block. This will take effect to whole website.

Difference between responsive and normal template