Remove Rockettheme Copyright From Joomla Template?

Anyone know how?

Affinity - RocketTheme Joomla Template

Affinity is a Joomla template designed by RocketTheme in July, 2009. Affinity is a complex and sophisticated community theme. The theme is prebuilt with three, very distinct colour variations to match numerous purposes. The style has full compatibility with RokNavMenu to sync your Joomla menus.

SolarSentinel - RocketTheme Joomla Template

SolarSentinel Joomla template was designed by RocketTheme. SolarSentinel has staggering assortment of powerful and functional modules, array of varying module hilites, a sophisticated and SEO friendly layout and incredible flexibility. This Joomla template is an ideal choice for any situation. It is ready to impress.