Revert of [es6] implement default parameters via desugaring

Revert of [es6] implement default parameters via desugaring (patchset #19 id:380001 of https://codereview.chromium.org/1127063003/)

Reason for revert:
Broken on arm64

Original issue's description:
> [es6] implement default parameters via desugaring
>
> Stage 1 implementation:
>
> - Parameters can't be referenced before initialized (from left-to-right)
> - SingleNameBindings only, no support for BindingPatterns
>
> Known issues:
>
> - Incorrect scoping (parameter expressions may reference variables declared in function body)
> - Function arity is untouched
> - Hole-checking needs work
> - Rest parameters are broken when mixed with optional arguments
>
> BUG=v8:2160
> LOG=N
> R=arv@chromium.org, rossberg@chromium.org
>
> Committed: https://crrev.com/892c85485881f8be2f17bd83238980f858126576
> Cr-Commit-Position: refs/heads/master@{#28739}

TBR=rossberg@chromium.org,wingo@igalia.com,arv@chromium.org,dslomov@chromium.org,adamk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:2160
Committed: https://crrev.com/904fbc303a759de5d1d83667a1203f44a8ef9760
Cr-Commit-Position: refs/heads/master@{#28740}

[caitp (gmail), 2015-06-01 18:30:10]

Created Revert of [es6] implement default parameters via desugaring

[commit-bot: I haz the power, 2015-06-01 18:30:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1163853002/1

[commit-bot: I haz the power, 2015-06-01 18:30:48]

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

[commit-bot: I haz the power, 2015-06-01 18:30:49]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[arv (Not doing code reviews), 2015-06-01 18:33:43]

LGTM

[arv (Not doing code reviews), 2015-06-01 18:34:01]

The CQ bit was checked by arv@chromium.org

[caitp (gmail), 2015-06-01 18:34:05]

The CQ bit was checked by caitpotter88@gmail.com

[commit-bot: I haz the power, 2015-06-01 18:34:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1163853002/1

[commit-bot: I haz the power, 2015-06-01 18:35:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-01 18:35:13]

Patchset 1 (id:??) landed as
https://crrev.com/904fbc303a759de5d1d83667a1203f44a8ef9760
Cr-Commit-Position: refs/heads/master@{#28740}