Revert of Add test for previously unflattenables (patchset #1 id:1 of https://codereview.chromium.org/1514373003/ )

Reason for revert:
Speculative fix for skbug.com/4709

Original issue's description:
> Add test for previously unflattenables
>
> BUG=skia:4613
>
> Committed: https://skia.googlesource.com/skia/+/061aaa79f7d8a2e93962e8296abaae13f0a7a715

TBR=halcanary@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4613

Review URL: https://codereview.chromium.org/1532753002
1 file changed