Remove FAIL from test262-es6.status

TBR=rossberg
BUG=v8:3642
LOG=Y

Review URL: https://codereview.chromium.org/698073003

Cr-Commit-Position: refs/heads/master@{#25088}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25088 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/test262-es6/test262-es6.status

@@ -33,9 +33,6 @@
   '11.2.3_b': [FAIL],
   '12.2.3_b': [FAIL],
 
-  # BUG(v8:3642)
-  'S7.6.1.2_A1.26ns': [FAIL],
-
   # Unicode canonicalization is not available with i18n turned off.
   '15.5.4.9_CE': [['no_i18n', SKIP]],