Remove redundant code in RewriteTexelFetchOffset Remove useTemporaryIndex() in function RewriteTexelFetchOffset since no temporary variables will be created in this function. BUG=angleproject:1469 Change-Id: Ibed56f0ba5c89b6ae1ab1611de39514c3fbb600f Reviewed-on: https://chromium-review.googlesource.com/387198 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>