Two different workarounds:

1. Navigate to the event invitation itself and delete the constituent from the invitee list. This will also exclude the constituent from the Invitation History tab.

2. Delete the invitation from the event record itself. Please note, this will remove the invitation from ALL of the constituent records that are invitees.

It has been reported to Support that the invitation was an error, was deleted from the invitation process, but cannot be removed from the constituent record, thereby creating erroneous data that cannot be cleaned up.

This functionality is important for skeleton records (GDPR)

this would be great! i spend a lot of time asking our IT services to make this adjustment from the back end. 

This feature would be well used post-testing phase of the email process. Our team sees the current option as a detriment to our provided service.  

This would be great for when you add/invite the wrong Jim Jones to your event! We need this!!!

This would greatly facilitate post-event clean-up for our Dev Ops team. Please consider!