Remove non-smart SkFontConfigInterface::SetGlobal.

This method is no longer used and is superseded by the 'smart' version.

Change-Id: Ic27545a2ec2666d77966727630ba7e960eac5506
Reviewed-on: https://skia-review.googlesource.com/128316
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2 files changed