Twitter collects all your interests and you can uncheck these on this page https://twitter.com/settings/your_twitter_data/twitter_interests
But there are maybe 1000+ items to uncheck, but no way how to remove them all.
I have created simple bookmarklet.
Create new favorite page (Bookmark - ctrl + D) in your browser and put this string into url field and save it.
Now go to Twitter Interests page settings and click on your new Bookmarked page (it is called
bookmarklet) and voila.