Revert "Add vector GrSLTypes for shorts"

This reverts commit af37a53a84d03fa08bc2f447034d7db754cfc5ba.

Reason for revert: Compiler errors

Original change's description:
> Add vector GrSLTypes for shorts
> 
> Bug: skia:
> Change-Id: Icb9eb1fcb0f879cd0bfdd27d06459843361c9947
> Reviewed-on: https://skia-review.googlesource.com/62943
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>

TBR=egdaniel@google.com,csmartdalton@google.com,ethannicholas@google.com

Change-Id: Ib23b28be92e199459fe1666fb1ec0e46e141a8f7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/63460
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
4 files changed