Remove chromecast jobs

If we need to support the Ultras, I vote we use taskdrivers instead of
these old recipes.

Bug: skia:9899
Change-Id: I9a3adedde5e7b28d90d3f836ccab0c7fe40abd38
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/270440
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
19 files changed