Scope cleanup: remove unused bits and accessors

Scope cleanup: remove unused bits and accessors

- inner_scope_uses_arguments_ was completely unused
- The public accessor for contains_with() was not called
- inside_with() had helper methods on Parser and PatternRewriter, but was
  only called in one place.

Committed: https://crrev.com/a6ef1ea8aea37090906eb96e90b9476157c1df16
Cr-Commit-Position: refs/heads/master@{#31587}

[adamk, 2015-10-27 00:08:19]

adamk@chromium.org changed reviewers:
+ littledan@chromium.org

[Dan Ehrenberg, 2015-10-27 00:15:50]

lgtm

Yay!

[adamk, 2015-10-27 00:46:21]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2015-10-27 00:46:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1409253007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1409253007/1

[commit-bot: I haz the power, 2015-10-27 00:47:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-27 00:48:10]

Patchset 1 (id:??) landed as
https://crrev.com/a6ef1ea8aea37090906eb96e90b9476157c1df16
Cr-Commit-Position: refs/heads/master@{#31587}