Remove stray reference to SH_EMULATE_BUILT_IN_FUNCTIONS. BUG=chromium:642227 Change-Id: Ie1d74c0abd355a0bddc3c2b700390a3a2a9c4823 Reviewed-on: https://chromium-review.googlesource.com/379875 Reviewed-by: Zhenyao Mo <zmo@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>