[egg] Remove non-deterministic checks in spawn tests.
[egg] Remove non-deterministic checks in spawn tests.

These complete in a different thread, and the check is vulnerable
to a race condition.

Distrotech/gcr,stefwalter/gcr,stefwalter/gcr,stefwalter/gcr,stefwalter/gcr,Distrotech/gcr,Distrotech/gcr,Distrotech/gcr