[interpreter] Enable webkit test that no longer fails.

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1908503003

Cr-Commit-Position: refs/heads/master@{#35710}

test/webkit/webkit.status

@@ -100,12 +100,6 @@
   # Skip tests that timeout.
 }],  # 'gc_stress == True and mode == debug'
 
-##############################################################################
-['ignition == True', {
-  # TODO(4680): Throws a RangeError due to stack overflow. Need investigation.
-  'fast/js/excessive-comma-usage': [SKIP],  # Stack is brittle, SKIP not FAIL.
-}],  # ignition == True
-
 ##############################################################################
 ['ignition == True and msan', {
   # TODO(mythria,4680): Too slow and timeout on ignition.