Revert "fixed iOS build failure"

This reverts commit 83cd50b8afb0769154321ad39866f699c2c28e1e.

Reason for revert: Need to revert previous SkSL CL

Original change's description:
> fixed iOS build failure
> 
> BUG=skia:
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4997
> 
> Change-Id: I5c3727c5dc0e30ae88e1879e12547bdb11db97ee
> Reviewed-on: https://skia-review.googlesource.com/4997
> Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> 

TBR=bsalomon@google.com,ethannicholas@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Iaafb7abae666556132211e6d49766e629dbec9ba
Reviewed-on: https://skia-review.googlesource.com/5076
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
2 files changed