Fix networkState_during_progress.html expectations

Bug: 909799
Change-Id: I9fdeec4f569d7ee272f8a384012fec3a201908eb
Reviewed-on: https://chromium-review.googlesource.com/c/1354220Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#611793}

third_party/blink/web_tests/media/W3C/video/networkState/networkState_during_progress-expected.txt

@@ -9,5 +9,3 @@ TEST COMPLETE
 
 
 spec reference
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