Remove stderr redirect hack from build/download_gold_plugin.py.

It is no longer necessary now that crbug.com/494442 is fixed.

BUG=494442,615538
R=thakis@chromium.org

Review-Url: https://codereview.chromium.org/2023073002
Cr-Commit-Position: refs/heads/master@{#396930}
1 file changed