Revert of Add SIMD 128 alignment support to Heap.

Revert of Add SIMD 128 alignment support to Heap. (patchset #3 id:40001 of https://codereview.chromium.org/1159453004/)

Reason for revert:
Breaks Linux - arm64 - sim - MSAN
TBR=jochen

Original issue's description:
> Add SIMD 128 alignment support to Heap.
> Adds SIMD 128 alignment sizes and masks.
> Adds support in Heap for SIMD alignments and fills.
> Reworks cctest so that each test independently aligns its allocation address, rather than depending on the previous tests ending state. Adds test cases for SIMD.
>
> LOG=N
> BUG=v8:4124
TBR=hpayer@chromium.org,jochen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4124
Committed: https://crrev.com/6a6388f07d3926587122a462a746f1a450858864
Cr-Commit-Position: refs/heads/master@{#28768}

[bbudge, 2015-06-02 21:08:08]

Created Revert of Add SIMD 128 alignment support to Heap.

[commit-bot: I haz the power, 2015-06-02 21:08:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169453003/1

[commit-bot: I haz the power, 2015-06-02 21:08:27]

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

[commit-bot: I haz the power, 2015-06-02 21:08:29]

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.

[jochen (gone - plz use gerrit), 2015-06-02 21:12:36]

The CQ bit was checked by jochen@chromium.org

[jochen (gone - plz use gerrit), 2015-06-02 21:12:36]

lgtm

[commit-bot: I haz the power, 2015-06-02 21:12:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169453003/1

[commit-bot: I haz the power, 2015-06-02 21:13:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-02 21:16:02]

Patchset 1 (id:??) landed as
https://crrev.com/6a6388f07d3926587122a462a746f1a450858864
Cr-Commit-Position: refs/heads/master@{#28768}