chore: refactor some code and remove obsolete variable

lib/readyHandler.js

@@ -2,6 +2,7 @@
 
 const debug = require('./debug')
 const Command = require('./command')
+const utils = require('./utils')
 
 function onConnect (client) {
   debug('Stream connected %s id %s', client.address, client.connectionId)
@@ -10,14 +11,12 @@ function onConnect (client) {
   // fast properties. If that's not the case, make them fast properties
   // again!
   client.connected = true
-  client.ready = false
-  client.emittedEnd = false
   client._stream.setKeepAlive(client.options.socketKeepalive)
   client._stream.setTimeout(0)
 
   // TODO: Deprecate the connect event.
   client.emit('connect')
-  client.initializeRetryVars()
+  utils.setReconnectDefaults(client)
 
   if (client.options.noReadyCheck) {
     readyHandler(client)