[skif] Remove legacy Tile implementation

Also cleans up a missed define from https://skia-review.googlesource.com/c/skia/+/721819

Bug: skia:9282
Bug: b/263137785
Change-Id: Ib13ec4abb0e57dda4e6fa621d2ceed0fc4725ba3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/723817
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
2 files changed