If you still see removed webparts, delete them from Site’s Webpart Gallery

If you still see the deactivated / removed feature’s webparts, you can go to the WebPart Gallery (/_catalogs/wp/Forms/AllItems.aspx) and delete them from there.

If you still see the deactivated / removed feature’s webparts, you can go to the WebPart Gallery (/_catalogs/wp/Forms/AllItems.aspx) and delete them from there.ref: http://social.msdn.microsoft.com/Forums/en-US/sharepointdevelopment/thread/ff9338f2-89db-40a2-9b9d-ca4a32d8d573