remove a spurious wait that could get us into trouble

it's not really clear that this wait is useful for anything
except generating bugs when we've done terible things to the
image during this test. Removing it as unneeded.

Change-Id: I88546bf3845d8e62d4baf5572f0403c0eaa983ba
Closes-Bug: #1229890
Merge "remove a spurious wait that could get us into trouble"