Remove a LayoutTest expectation that is no longer relevant.

BUG=368814
TBR=jww

Review URL: https://codereview.chromium.org/320403003

git-svn-id: svn://svn.chromium.org/blink/trunk@175841 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -484,8 +484,6 @@ crbug.com/248063 plugins/plugin-clip-subframe.html [ Pass Failure ]
 crbug.com/254332 [ SnowLeopard Debug ] fast/forms/checkbox/checkbox-focus-by-mouse-then-keydown.html [ ImageOnlyFailure Pass ]
 crbug.com/254332 [ XP ] fast/forms/submit/submit-focus-by-mouse.html [ ImageOnlyFailure Pass ]
 
-crbug.com/256506 [ Win7 Debug ] crypto/worker-random-values-limits.html [ Pass Crash ]
-
 crbug.com/244266 virtual/threaded/animations/animation-controller-drt-api.html [ Failure Pass ]
 
 crbug.com/265650 compositing/repaint/transform-style-change.html [ Pass ImageOnlyFailure ]