create_A04_t04 should not expect that the target of the symlink must exist on Windows

[brianquinlan]

This is the relevant code.

I've updated the docs in this PR.

I think that this test can just be deleted.

[sgrekhov]

According to the updated docs if we are create a Link to a not existing directory then this link should be created and be a file simlink. I'll change the tests accordingly. If you don't mind I'll do it after the landing of the PR

[brianquinlan]

Sure. The PR is documentation-only though.