remove unused headers

src/connection.js

@@ -41,7 +41,7 @@ export default class Connection {
             this.normalizedNodes.push(Connection.normalizeNode(nodes, this.headers))
         }
 
-        this.transport = new Transport(this.normalizedNodes, this.headers, timeout)
+        this.transport = new Transport(this.normalizedNodes, timeout) // TODO
     }
 
     static normalizeNode(node, headers) {

src/request.js

@@ -21,9 +21,8 @@ const BACKOFF_DELAY = 0.5 // seconds
 
 
 export default class Request {
-    constructor(node, requestConfig) {
+    constructor(node) {
         this.node = node
-        this.requestConfig = requestConfig
         this.backoffTime = null
         this.retries = 0
         this.connectionError = null

src/transport.js

@@ -15,13 +15,13 @@ import Request from './request'
 
 
 export default class Transport {
-    constructor(nodes, headers, timeout) {
+    constructor(nodes, timeout) {
         this.connectionPool = []
         this.timeout = timeout
         // the maximum backoff time is 10 seconds
         this.maxBackoffTime = timeout ? timeout / 10 : 10000
         nodes.forEach(node => {
-            this.connectionPool.push(new Request(node, headers))
+            this.connectionPool.push(new Request(node))
         })
     }