merge revision(s) 55380: [Backport #12255]
* ext/json/lib/*.rb: Removed some comments. Because these are unnecessary class description. [ci skip][Bug #12255][ruby-core:74835]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@55928 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 55380: [Backport #12255]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@55928 b2dd03c8-39d4-4d8f-98ff-823fe69b080e