I have a rather large and growing loss of disk space that seems to be due to a huge amount of data being store in /var/folders/hj/f5bs6xg92ygcdltpddbdznsh0000gn/C/com.apple.DeveloperTools/All/Xcode/EmbeddedAppDeltas. It seems to be caching old builds of my project going back more than a year.
1. What are these app deltas?
2. Can I just trash them safely?
3. Is there a better way to maintain the builds so that this doesn't keep growing?
A note about my build process - I use Unity3D and routinely build new Xcode projects, often replacing the existing version, although sometimes I manually delete the Xcode project folder. Might that have something to do with it?