Does anyone know of a way to disable notifications if you are removing attachments via the API?
Are you using AttachmentService to remove it (it will update the IssueHistory and stuff)? If you are, take a look at the AttachmentManager instead.
Looking at the source, it doesn’t do all of the extra stuff. You’d have to add the removal to the IssueHistory (but at that point you can tell it not to send notifications).