No, but yes.
Sub tasks are enabled globally. But you don't have to include any in your "issue type scheme". So, to "disable them in a project", just create an issue type scheme that doesn't have any and use that for the projects that don't want them.
JIRA plays nice and drops the option to create or convert them off the menus too.
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs