Removed legacy compile command plus dependencies

After I did this I heard from @mereskin that this command is still used in the backend. If that's the case, we should do something about that, and not let it contaminate this repo.

My proposal would be to clone this repo to a backend repo from which we strip everything except the compile command. It should be deprecated in Q2 or Q3 once we have moved all gadgets to either iframes or web components. @dylanpyle @rjz @cruhland ?