We already have verifications that a domain application was created in sunrise
- which checks for end-date sunrise. Start-date sunrise has checks that a
domain (not application) was created. There's no need to specifically check for
a signed mark, since a successful domain create during sunrise must have a
signed mark in it.
Also removed the requirement for end-date sunrise / landrush testing.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=190551080