Revert "added authentication via cookies (#63)" (#64)

This reverts commit 2f4cc27.

linkedin2username.py

@@ -203,9 +203,6 @@ def parse_arguments():
                         help='Specify your password in clear-text on the '
                         'command line. If not specified, will prompt and '
                         'obfuscate as you type.')
-    parser.add_argument('--cookie', type=str, action='store',
-                        help='Instead of logging in with a password, '
-                        'provide the li_at cookie assigned after login ')
     parser.add_argument('-n', '--domain', type=str, action='store',
                         default='',
                         help='Append a domain name to username output. '
@@ -256,8 +253,7 @@ def parse_arguments():
 
     # If password is not passed in the command line, prompt for it
     # in a more secure fashion (not shown on screen)
-    if args.cookie is None: 
-        args.password = args.password or getpass.getpass()
+    args.password = args.password or getpass.getpass()
 
     return args
 
@@ -317,14 +313,6 @@ def login(args):
         'loginCsrfParam': login_csrf
         }
 
-    # If authentication via cookies is specified, set the important cookie 
-    # and return the session
-    if args.cookie:
-
-        session.cookies['li_at'] = args.cookie
-        return session
-
-
     # Perform the actual login. We disable redirects as we will use that 302
     # as an indicator of a successful logon.
     response = session.post('https://www.linkedin.com/checkpoint/lg/login-submit'