Remove unused code, AstValueFactory::ConcatStrings.

Remove unused code, AstValueFactory::ConcatStrings.

BUG=

Committed: https://crrev.com/0315bfff6b0f85d5d576156d1849ed217a553969
Cr-Commit-Position: refs/heads/master@{#41497}

[vogelheim, 2016-12-02 10:41:18]

The CQ bit was checked by vogelheim@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-02 10:41:26]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[vogelheim, 2016-12-02 10:49:39]

vogelheim@chromium.org changed reviewers:
+ marja@chromium.org

[commit-bot: I haz the power, 2016-12-02 11:07:11]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-12-02 11:07:12]

Dry run: This issue passed the CQ dry run.

[marja, 2016-12-02 11:48:59]

lgtm

(I had to dig up where this code originated from, since I was pretty sure I
didn't write it; seems like it was used for "harmony private fields" by
https://codereview.chromium.org/2348783002/ ).

[vogelheim, 2016-12-02 12:17:01]

On 2016/12/02 11:48:59, marja wrote:
> lgtm
> 
> (I had to dig up where this code originated from, since I was pretty sure I
> didn't write it; seems like it was used for "harmony private fields" by
> https://codereview.chromium.org/2348783002/ ).

Thanks for looking that up. It seems that that was preparatory work for a CL
that is still in the works (https://codereview.chromium.org/2329703002/); so
I'll check with those folks first.

[vogelheim, 2016-12-05 17:34:48]

The CQ bit was checked by vogelheim@chromium.org

[commit-bot: I haz the power, 2016-12-05 17:34:50]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-05 18:00:25]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480959288167570, "parent_rev":
"ac955274f9eea93918f11355dcea0b5c39d1dc67", "commit_rev":
"9c4f89b7e26215a2c01311da3614819748f6a611"}

[commit-bot: I haz the power, 2016-12-05 18:00:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-05 18:00:44]

Description was changed from

==========
Remove unused code, AstValueFactory::ConcatStrings.

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

to

==========
Remove unused code, AstValueFactory::ConcatStrings.

BUG=

Committed: https://crrev.com/0315bfff6b0f85d5d576156d1849ed217a553969
Cr-Commit-Position: refs/heads/master@{#41497}
==========

[commit-bot: I haz the power, 2016-12-05 18:00:45]

Patchset 1 (id:??) landed as
https://crrev.com/0315bfff6b0f85d5d576156d1849ed217a553969
Cr-Commit-Position: refs/heads/master@{#41497}