Remove themes

Somewhere on this forum I read that in the final 2.5 release it would be easier to remove themes, but I don't see how it is done. My project now always starts with the Dutch theme. At Setting / Deployment I have the options 'Default" and "theme-mac", how can I remove the themes I don't want? Edward
1 answers

When you do not want to be able to select "theme-mac" remove this from the project-directory in folder "theme".

The default-theme cannot be removed.