[Fuchsia] Remove some unnecessary defined(OS_FUCHSIA) conditionals.

Bug: 854721
Change-Id: I0bbad92f6698db479518f268d0ae797a0a3d2d81
Reviewed-on: https://chromium-review.googlesource.com/c/1424598
Reviewed-by: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Albert J. Wong <ajwong@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625332}
3 files changed