remove endpoint as referenced by @joshthecoder in #288

tweepy/api.py

@@ -249,13 +249,6 @@ class API(object):
         require_auth = True
     )
 
-    """ friendships/exists """
-    exists_friendship = bind_api(
-        path = '/friendships/exists.json',
-        payload_type = 'json',
-        allowed_param = ['user_a', 'user_b']
-    )
-
     """ friendships/show """
     show_friendship = bind_api(
         path = '/friendships/show.json',
@@ -264,7 +257,6 @@ class API(object):
                           'target_id', 'target_screen_name']
     )
 
-
     """ Perform bulk look up of friendships from user ID or screenname """
     def lookup_friendships(self, user_ids=None, screen_names=None):
 	    return self._lookup_friendships(list_to_csv(user_ids), list_to_csv(screen_names))