inspector-protocol/debugger/setPauseOnExceptions-uncaught.html often times out on Yosemite WK2, but not on other OS X versions: http://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=inspector-protocol%2Fdebugger%2FsetPauseOnExceptions-uncaught.html https://build.webkit.org/results/Apple%20Yosemite%20Release%20WK2%20(Tests)/r175218%20(183)/inspector-protocol/debugger/setPauseOnExceptions-uncaught-pretty-diff.html
<rdar://problem/18783087>
Marked as failing in r175708.
Removing the expectation, because the test should be skipped per webkit.org/b/100846 and webkit.org/b/136715, and the expectation was making it un-skipped.