remove duplicate auth

Author: jatinbs

README.md

@@ -45,13 +45,6 @@ All requests are pre-processed and validated. This section outlines how we handl
     
     Possible error codes are `required` and `invalid`.
 
-### Authentication
-All methods need to authenticate who you are. Before spawning browser workers and deleting a worker for example. Authentication is done using your username and the BrowserStack access key within the HTTP request. For example:
-
-    $ curl -u "username:access_key" https://api.browserstack.com/4
-
-> A `401 Unauthorized` response is given if an unauthorized request is made.    
-
 ### HTTP Verbs
 The API is kept concise and simple by making use of relevant HTTP verbs on each requests. The specifications for these are vague and their use within this API is specific but in general we follow the following rules: