Yes. In Settings > Delivery Zones, tick the zones you no longer need and click Archive to remove them from your active list. Archived zones aren’t gone for good — use the Add filter control below the map to show Archived or All, then select and Unarchive any you want back. This keeps your active zone list tidy without losing past boundaries. Available in both EasyRoutes for Shopify and EasyRoutes for Web.
See: Delivery Zones