Revert "SkSL: Test/implement "geometric" intrinsics"

This reverts commit 0d5d956f7b9a11d1b16e525a40d7aad0890e455b.

Reason for revert: doesn't compile on Metal, breaks tree

Original change's description:
> SkSL: Test/implement "geometric" intrinsics
>
> Bug: skia:10913
> Change-Id: Ie82354b05db141c8ab90b1a615ddfada4f71a98b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/335049
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: John Stiles <johnstiles@google.com>

TBR=brianosman@google.com,johnstiles@google.com

Change-Id: I3a44eaf7bafe2fa2d185186c48c39b61116dd2fe
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:10913
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337186
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
6 files changed