Ruby

remove wrong expectation

• spec/rubyspec/core/kernel/itself_spec.rb: object_id may return
  different objects for each calls, and the expectation of object
  identity is done by equal matcher which uses equal? method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58704 b2dd03c8-39d4-4d8f-98ff-823fe69b080e