You can't do this.
If you want rid of an issue type, then you have to remove it from the issue type scheme, either by deleting it, or by moving the project to a scheme without it.
However you remove the issue type, JIRA will force you to move all issues using that type to another one. It can't function in a project having issue types that don't exist - it needs them for the entire structure of the system.
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 ...
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