Revert "added more SPIR-V RelaxedPrecision decorations"

This reverts commit 151a883e86c3e81924312dbc2a9e3dabcb990b12.

Reason for revert: lots of broken GMs

Original change's description:
> added more SPIR-V RelaxedPrecision decorations
> 
> Bug: skia:
> Change-Id: I5717dc2c6d78f5a09ad4e948a73414fe514a4613
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/208513
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

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

Change-Id: Ia58f99a30a6c2cbe1593c56a368d6fb7930d7006
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/208862
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
2 files changed