Remove flaky expectations for event_order_loadstart_progress.html

No new failures since the speculative fix was committed.

BUG=333880

Review URL: https://codereview.chromium.org/212763007

git-svn-id: svn://svn.chromium.org/blink/trunk@170321 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -798,7 +798,6 @@ crbug.com/333882 [ Win ] inspector/elements/edit-trimmed-attribute-value.html [
 crbug.com/333882 [ Win7 ] inspector/elements/styles/styles-change-node-while-editing.html [ Pass Failure ]
 crbug.com/333882 [ Win ] inspector/elements/styles/undo-add-rule-crash.html [ Pass Timeout ]
 
-crbug.com/333880 [ Win7 Debug ] media/W3C/video/events/event_order_loadstart_progress.html [ Pass Failure ]
 crbug.com/306249 media/W3C/video/networkState/networkState_during_progress.html [ Pass Failure ]
 
 crbug.com/345649 fast/repaint/delete-into-nested-block.html [ Pass Failure ]