Remove v8 gn config from secondary tree

Remove v8 gn config from secondary tree

We'll important the BUILD.gn into v8 instead to make maintaining it
easier

BUG=none
R=brettw@chromium.org
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=268170

[brettw, 2014-04-29 21:38:53]

lgtm

[jochen (gone - plz use gerrit), 2014-04-30 17:04:47]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2014-04-30 17:05:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jochen@chromium.org/253843008/1

[commit-bot: I haz the power, 2014-04-30 18:12:58]

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

[commit-bot: I haz the power, 2014-04-30 18:12:58]

Try jobs failed on following builders:
  win_chromium_x64_rel on tryserver.chromium

[jochen (gone - plz use gerrit), 2014-05-05 12:39:09]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2014-05-05 12:39:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jochen@chromium.org/253843008/1

[commit-bot: I haz the power, 2014-05-05 13:31:42]

Change committed as 268170