remove unused var in ruby server

Author: zpao

server.rb

@@ -17,8 +17,8 @@
 server = WEBrick::HTTPServer.new :Port => 3000, :DocumentRoot => root
 
 server.mount_proc '/comments.json' do |req, res|
-  comments = react_version = JSON.parse(File.read('./_comments.json'))
-  
+  comments = JSON.parse(File.read('./_comments.json'))
+
   if req.request_method == 'POST'
     # Assume it's well formed
     comments << req.query