Remove fs.createOutputStream()

[jprichardson]

Recently I was using fs.createOutputStream() in https://github.com/jprichardson/node-cfs/blob/0.5.0/index.js#L30 and I was getting some weird errors. The problem is that fs.createOutputStream is a hack that is NOT heavily tested. It doesn't seem to belong in this library.

I will almost certainly create a separate module for it and remove it entirely from fs-extra.

[donaldpipowitch]

Was the only reason for this removal, because it was not heavily tested? :( Sad to see this go.

[jprichardson]

@donaldpipowitch sorry 😞 Yeah, I felt that because it has weird edge cases on different Node versions, that it may hold the entire library back. So I thought it was best to remove it. Rest assured though, it's still alive, just in a separate module: https://github.com/jprichardson/create-output-stream