Revert of Automatically download gold plugin for cfi builds.

Revert of Automatically download gold plugin for cfi builds. (patchset #1 id:1 of https://codereview.chromium.org/1303183005/ )

Reason for revert:
Breaks windows.

Original issue's description:
> Automatically download gold plugin for cfi builds.
>
> BUG=chromium:515782
> LOG=n
> NOTRY=true
>
> Committed: https://crrev.com/c8dbd2c477c47a34593a0e7deee55915425b4ac2
> Cr-Commit-Position: refs/heads/master@{#30556}

TBR=bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:515782
Committed: https://crrev.com/1ec920704e4de56f652490bceebdc03b41efa5d2
Cr-Commit-Position: refs/heads/master@{#30558}

[Michael Achenbach, 2015-09-03 12:50:15]

Created Revert of Automatically download gold plugin for cfi builds.

[commit-bot: I haz the power, 2015-09-03 12:50:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1329653004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1329653004/1

[commit-bot: I haz the power, 2015-09-03 12:50:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-03 12:50:58]

Patchset 1 (id:??) landed as
https://crrev.com/1ec920704e4de56f652490bceebdc03b41efa5d2
Cr-Commit-Position: refs/heads/master@{#30558}