Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
Jonathan GrieveTreehouse Moderator 90,845 Points
Themes can't be "deactivated" as such, they're switched and only one theme can be the "activated" theme at any one time.
To remove your theme from the list of installed themes you would need to either delete all the files from the theme folder, in your WordPress installation or delete the meta comments from the main theme file. :-)
Good luck :-)