Removal of the no longer flaky test from the list
Removal of the no longer flaky test from the list

webgl-remote-read-remote-image-allowed-with-credentials.html test is no 
longer flaky for DEBUG Linux as per the flakiness dashboard.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html

Review URL: https://codereview.chromium.org/440343002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@179793 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs