Comment 5 for bug 2058007

In 3.5, the way images are synchronised is changed. An image that can be deployed must be synchronised between region controllers, if it's not synchronised it's not considered available and wouldn't be shown on the UI. Rack controllers download images from regions on demand and cache them, making synchronisation status irrelevant. The synchronisation status needs to be removed from the UI in MAAS 3.5+.