You can delete comments on projects you have or on your page but if it's on someone else's page or someone else's project it won't let you delete your own comments. The delete button is gone. It would be great for the ability to delete your own comments.

That has been rejected:

Za-Chary wrote:

4.3 Delete or edit your comments everywhere
The inability to delete your comments everywhere is put in place so users do not post inappropriate comments or spam comments on other users' profiles, projects, or studios, just to delete them later on. In contrast, you are not really likely to spam your own projects or profile. Editing comments could similarly lead to comment manipulation, such as a user commenting “I like this project!”, waiting until someone replies with “I agree!”, and then editing the original comment to say “I hate this project!”.

SpideyPlaysMC wrote:

-snip-

Thanks! Closed as rejected.