bin/right_speed in right_speed-0.1.0 vs bin/right_speed in right_speed-0.2.0

@@ -24,13 +24,11 @@
 
     DEFAULT_RACKUP_PATH = 'config.ru'
     DEFAULT_PORT = Server::DEFAULT_PORT
     DEFAULT_WORKERS = Env.processors
     DEFAULT_WORKER_TYPE = Server::DEFAULT_WORKER_TYPE
-    DEFAULT_LISTENER_TYPE = Server::DEFAULT_LISTENER_TYPE
 
-    AVAILABLE_WORKER_TYPES = Server::AVAILABLE_WORKER_TYPES.map(:to_s).join('/')
-    AVAILABLE_LISTENER_TYPES = Server::AVAILABLE_LISTENER_TYPES.map(:to_s).join('/')
+    AVAILABLE_WORKER_TYPES = Server::AVAILABLE_WORKER_TYPES.map(&:to_s).join('/')
 
     def self.show_help(error: false, error_message: nil)
       STDERR.puts(error_message, "\n") if error_message
       STDERR.puts <<~EOS
         Usage: right_speed [options]