Remove includes from SkFontTypes.h

These aren't needed and at least the comment on the one seems out of
date.

Change-Id: If76723b7534b338b4d85b84b7c436bf9659a5f15
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/208666
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
1 file changed