Oh no! You misunderstood me. I thought you m,ay have other CSS editing issues and that's why I provided the CSS Forum link
What posted in the other thread is correct. Footer removal is NOT allowed as it's a Terms of Service Violation and there's no getting around that reality.
I'm afraid doing that is a ToS violation. Read this section before purchasing the CSS upgrade
May I remove credit links such as ‘Blog at WordPress.com’, theme, font, or toolbar links?
All WordPress.com bloggers are required to maintain the credit links, even our VIP bloggers. Please do not hide or alter text or links for the footer credits or the toolbar. Modifying the style of the footer text (i.e. colors and font size) is fine as long as it’s still readable. http://en.support.wordpress.com/custom-design/#frequently-asked-questions
11. Attribution. Automattic reserves the right to display attribution links such as ‘Blog at WordPress.com,’ theme author, and font attribution in your blog footer or toolbar. Footer credits and the WordPress.com toolbar may not be altered or removed regardless of upgrades purchased. http://en.wordpress.com/tos/