Remove special drawShadow code when optimizing for size.

Looks like it removes about 30k.

Bug: skia:13657
Change-Id: I37d715d0e5d0458bb2b9cbfa2b0e69af4cf538a2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/596121
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
16 files changed