The editor should have a "Remove unused assets" feature.
My case: I have assets to create a terrain. The size of these assets is about 10 GB. After my terrain creation I only use a small amount of it like textures etc. But I do not want the terrain editor and the presets etc. anymore.
There is already a feature to select all dependencies.
Where is a "Invert Selection" or "Select Unused Assets" button?