Remove SkCanvas::ImageSetEntry constructors

Change-Id: Ib75b6a836184df739e4690dc275421e015d6a9bb
Reviewed-on: https://skia-review.googlesource.com/c/173228
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed