Mainly because I don't see the purpose of this command. Since it can't be used reliably to check whether a feature exists (it can be either a git hash or a SVN revision, so it can't be used for a >= version check), I dont see any point in rewriting it to use the new system, so I went ahead and removed it.

A new way to check for available features from scripts will be offered in a (hopefully) near future.

If there's any scenario where this command was of any actual use that I have overlooked, please let me know :3