The iTunes Source list on the left side of your iTunes window helps keep your content organized to make it easier to browse by content type, such as Music, Movies and TV Shows.
However, not every uses every type of content, and there’s an easy way to hide those categories you don’t actually need to see. Open your iTunes Preferences, and on the General tab you will see a list of checkboxes; simply uncheck the categories you don’t want to see in your iTunes Source list and they’ll vanish from view.
These same settings can also be used to hide and display additional features such as Ping, iTunes DJ, Genius, and Shared Libraries.
