Remove generateCharFromGlyph and charToGlyphID.

The methods on SkScalerContext are no longer used.

Change-Id: I6a5a5f2eb7018cb6369ea90649ab5a65b5a6660a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/208660
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
12 files changed