To delete a supersegment from the map and from Lucity™, complete the following steps:
Use the Dissolve Supersegments tool and click on the supersegment you want to dissolve. You will be prompted as follows:
If you really want to delete the supersegment, click "Yes" and the supersegment will be deleted from the Geodatabase and from Lucity . When the process is finished it will tell you that the supersegment is dissolved (deleted).