Unfortunately I had to remove the UnityDecompiled repo due to a request from Unity's legal team.

If you'd like to decompile Unity yourself, find your local UnityEditor.dll and decompile it using either ILSpy or dotPeek - it's easy!

Thanks to the community for all of your contributions over the past three years, it was a great resource while it lasted!

-Matt

UPDATE: Unity has now released an official repo of their C# source code!