Revert "implement SkScalar versions in terms of float versions"

This reverts commit 4c3cb3767f5af3860998b932702dc18619ab3e1e.

Reason for revert: investigate asan failures

Original change's description:
> implement SkScalar versions in terms of float versions
> 
> Bug: skia:
> Change-Id: I44ce228290f7fda5b7e3553c8543dcf581b1ca3b
> Reviewed-on: https://skia-review.googlesource.com/127128
> Reviewed-by: Cary Clark <caryclark@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=caryclark@google.com,reed@google.com

Change-Id: Ic790b15130a67f46a0a99fdf991c5c08d682be5e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/128060
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed