Remove outdated _snprintf and SK_SNPRINTF, use snprintf instead

Bug: skia:13879
Change-Id: I87abecf441d94df4b58f3eeb0e1ace479a059847
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/604956
Commit-Queue: Nicolette Prevost <nicolettep@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
3 files changed