rm unneeded SK_SUPPORT_LEGACY_DIDCONCAT44

Change-Id: I65cec59749f0e7f5fb13675293720afecffa6a80
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/284321
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
12 files changed