Fix TestExpectations lint failures

NOTRY=true
TBR=lunalu, horo, stgao, guidou

Bug: 
Change-Id: Id30e0adf8d32524c819025037605f4b0adec6354
Reviewed-on: https://chromium-review.googlesource.com/600190Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491711}

third_party/WebKit/LayoutTests/TestExpectations

@@ -3102,6 +3102,4 @@ crbug.com/749965 [ Win7 Debug ] media/controls/controls-video-keynav.html [ Fail
 crbug.com/750310 [ Win7 Debug ] virtual/off-main-thread-fetch/http/tests/inspector/network/network-blocked-reason.html [ Timeout ]
 
 # Sheriff failures 2017-08-03
-crbug.com/751906 http/tests/devtools/console/console-correct-suggestions.js [ Timeout Pass ]
-crbug.com/751906 virtual/mojo-loading/http/tests/devtools/console/console-correct-suggestions.js [ Timeout Pass ]
 crbug.com/751955 external/wpt/webusb/idlharness.https.html [ Timeout Pass ]