update SkUserConfig.h a bit

    - tweak comments to be immune to tools/rewrite_headers.py
    - remove a few bonkers settings no user should change

While I'm at it, re-run tools/rewrite_headers.py.

Change-Id: Ie588d604010dd26abcdd277c586cd6c58568dcf5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/214740
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
6 files changed