Remove pkg/petitparser and pkg/intl from checkout.

Remove third_party/pkg/petitparser and third_party/pkg/intl

BUG=
R=ricow@google.com

Committed: https://github.com/dart-lang/sdk/commit/58ea2fbce68cc8dd6cbfa1bb17175e8c10639379

[Bill Hesse, 2015-09-10 16:39:49]

whesse@google.com changed reviewers:
+ ricow@google.com

[Bill Hesse, 2015-09-10 17:01:19]

whesse@google.com changed reviewers:
+ ahe@google.com

[Bill Hesse, 2015-09-10 17:01:19]

These packages are only used in observatory, which has its own package root
downloaded from gcloud, and in site/try, as an uploaded available package.

Part of removing the last SVN checkouts from our DEPS.

[Bill Hesse, 2015-12-15 15:56:22]

Ping.  I can't find any emails or discussion we had about this, where we said
this would not be OK.

We want to remove these SVN checkouts from third-party.

[ricow1, 2015-12-16 08:14:46]

I was not looking at the second patch set no, sorry about that.

LGTM

[Bill Hesse, 2015-12-16 13:48:23]

Description was changed from

==========
Remove third_party/pkg/petitparser and third_party/pkg/intl

BUG=
==========

to

==========
Remove third_party/pkg/petitparser and third_party/pkg/intl

BUG=
R=ricow@google.com

Committed:
https://github.com/dart-lang/sdk/commit/58ea2fbce68cc8dd6cbfa1bb17175e8c10639379
==========

[Bill Hesse, 2015-12-16 13:48:24]

Committed patchset #2 (id:20001) manually as
58ea2fbce68cc8dd6cbfa1bb17175e8c10639379 (presubmit successful).

[sra1, 2015-12-16 22:21:48]

sra@google.com changed reviewers:
+ sra@google.com

[sra1, 2015-12-16 22:21:48]

Please put Intl back.
It is used by benchmarks.

It might be that intl is a little old.
In that case I would like you to put it back so we re-establish the baseline
against with recent compiler changes, then update it to a version recommended by
alanknight@