Revert of Fix downloading LLVM Gold plugin in the case, when Clang is up to date. (patchset #1 id:1 of https://codereview.chromium.org/1491203003/ )

Reason for revert:
This breaks Codesearch bots.

Original issue's description:
> Fix downloading LLVM Gold plugin in the case, when Clang is up to date.
>
> The script should download LLVM Gold plugin, if it's missing, even if the
> main Clang toolchain is up to date. This change is to match update.py
> functionality with the gone update.sh.
>
> BUG=464797,494442
>
> Committed: https://crrev.com/7ff79f9569429444dabdb6d5024918bc548916b3
> Cr-Commit-Position: refs/heads/master@{#362803}

TBR=thakis@chromium.org,krasin@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=464797,494442

Review URL: https://codereview.chromium.org/1494883004

Cr-Commit-Position: refs/heads/master@{#362938}
1 file changed