Removed unnecessary change log item.

Review URL: http://codereview.chromium.org/7740077

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9076 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

@@ -3,8 +3,6 @@
         Added dependency of v8_base on WinSocket2 Windows library in
         the GYP-build.
 
-        Introduced temporal dead zone behavior for let bindings.
-
         Various bugfixes.