generic_object.rb: useless methods

* ext/json/lib/json/generic_object.rb (JSON::GenericObject):
  remove useless overriding methods, [] and []=.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49161 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/json/lib/json/generic_object.rb

@@ -47,14 +47,6 @@ module JSON
       table
     end
 
-    def [](name)
-      table[name.to_sym]
-    end
-
-    def []=(name, value)
-      __send__ "#{name}=", value
-    end
-
     def |(other)
       self.class[other.to_hash.merge(to_hash)]
     end