Remove support for SDK dependencies.

Remove support for SDK dependencies.

BUG=https://code.google.com/p/dart/issues/detail?id=6354

Committed: https://code.google.com/p/dart/source/detail?r=20098

[Bob Nystrom, 2013-03-15 17:16:21]

I removed the docs for SDK deps yesterday. After this patch, I'll send out a
separate patch that removes "pkg/" from the SDK.

[nweiz, 2013-03-15 18:21:54]

A couple comments, but otherwise LGTM.

https://codereview.chromium.org/12790006/diff/1/utils/pub/validator/dependenc...
File utils/pub/validator/dependency.dart (left):

https://codereview.chromium.org/12790006/diff/1/utils/pub/validator/dependenc...
utils/pub/validator/dependency.dart:43: }
Should we maybe suggest that people use a dev dependency for "unittest: any"
dependencies for a while, as a migration path?

https://codereview.chromium.org/12790006/diff/1/utils/tests/pub/version_solve...
File utils/tests/pub/version_solver_test.dart (left):

https://codereview.chromium.org/12790006/diff/1/utils/tests/pub/version_solve...
utils/tests/pub/version_solver_test.dart:578: }
I don't understand why we're getting rid of this. Git and path dependencies
still don't natively understand versioning.

[Bob Nystrom, 2013-03-15 18:31:56]

Thanks!

https://codereview.chromium.org/12790006/diff/1/utils/pub/validator/dependenc...
File utils/pub/validator/dependency.dart (left):

https://codereview.chromium.org/12790006/diff/1/utils/pub/validator/dependenc...
utils/pub/validator/dependency.dart:43: }
On 2013/03/15 18:21:54, nweiz wrote:
> Should we maybe suggest that people use a dev dependency for "unittest: any"
> dependencies for a while, as a migration path?

I think the fix for users here is pretty simple, so I was just going to mention
"move your unittest deps to dev_deps" in the email when I tell people about
this.

I don't mind having a migration window, but it seemed like just one more TODO to
add to our pile. It probably would be a little more graceful to do this, but I
kind of want to just get this done completely. :)

https://codereview.chromium.org/12790006/diff/1/utils/tests/pub/version_solve...
File utils/tests/pub/version_solver_test.dart (left):

https://codereview.chromium.org/12790006/diff/1/utils/tests/pub/version_solve...
utils/tests/pub/version_solver_test.dart:578: }
On 2013/03/15 18:21:54, nweiz wrote:
> I don't understand why we're getting rid of this. Git and path dependencies
> still don't natively understand versioning.

Per our discussion, I don't think these test anything that isn't covered by
existing tests. I think they're just historical cruft.

[Bob Nystrom, 2013-03-15 18:34:27]

Committed patchset #1 manually as r20098 (presubmit successful).