* ChangeLog: remove a duplicated entry.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47697 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-09-24

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47698 b2dd03c8-39d4-4d8f-98ff-823fe69b080e