Revert of ES6 computed property names

Revert of ES6 computed property names (patchset #9 id:160001 of https://codereview.chromium.org/795573005/)

Reason for revert:
Crashes on Win32

http://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%201/builds/1357

Test: mjsunit/harmony/computed-property-names
Flags: --stress-opt --always-opt
Command: build\Release\d8.exe --test --random-seed=-233815021 --stress-opt --always-opt --nohard-abort --nodead-code-elimination --nofold-constants --harmony-computed-property-names test\mjsunit\mjsunit.js test\mjsunit\harmony\computed-property-names.js

Run #1
Exit code: -1073741819
Result: CRASH
Expected outcomes: PASS

Run #2
Exit code: -1073741819
Result: CRASH
Expected outcomes: PASS

Run #3
Exit code: -1073741819
Result: CRASH
Expected outcomes: PASS

Original issue's description:
> ES6 computed property names
>
> This adds support for computed property names, under the flag
> --harmony-computed-property-names, for both object literals and
> classes.
>
> BUG=v8:3754
> LOG=Y

TBR=dslomov@chromium.org,wingo@igalia.com
NOTREECHECKS=true
NOTRY=true
BUG=v8:3754
Committed: https://crrev.com/a76419f0f497db156eb1010e9b4be398951280cb
Cr-Commit-Position: refs/heads/master@{#25825}

[arv (Not doing code reviews), 2014-12-15 16:37:09]

Created Revert of ES6 computed property names

[commit-bot: I haz the power, 2014-12-15 16:38:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/809433002/1

[commit-bot: I haz the power, 2014-12-15 16:38:38]

Committed patchset #1 (id:1)

[Dmitry Lomov (no reviews), 2014-12-15 16:43:14]

lgtm

[commit-bot: I haz the power, 2014-12-17 10:13:38]

Patchset 1 (id:??) landed as
https://crrev.com/a76419f0f497db156eb1010e9b4be398951280cb
Cr-Commit-Position: refs/heads/master@{#25825}