Delete all Win8 tasks.

Bug: skia:14336
Change-Id: Id5722fd5a956cba0662eb90654c29ae1d966eac6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/702839
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Auto-Submit: Leandro Lovisolo <lovisolo@google.com>
4 files changed