[GN]: Remove dead code GetExtensionForOutputType

BUG=none
R=brettw@chromium.org,dpranke@chromium.org

Review URL: https://codereview.chromium.org/1367523010

Cr-Original-Commit-Position: refs/heads/master@{#350641}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 23dca52ade6cb7fbd30dbd95d35e5c398924acc6
2 files changed
tree: 3892ac44790e41121b94575997b149638482d492
  1. tools/