Remove duplicated test_list_servers_by_limits

test_list_servers_by_limits is incorrectly marked as a negative
test, and it is duplicatated with test_list_servers_filter_by_limit,
so this is to remove it.

The corresponding defcore patch is I052e4305a08e2c63277903357ffe2696f2e85c95

Change-Id: Ia0e6e78cba99b12b7ee258d943701f0a1974025b
diff --git a/tempest/api/compute/servers/test_list_servers_negative.py b/tempest/api/compute/servers/test_list_servers_negative.py
index 527f4bd..32678df 100644
--- a/tempest/api/compute/servers/test_list_servers_negative.py
+++ b/tempest/api/compute/servers/test_list_servers_negative.py
@@ -84,12 +84,6 @@
         servers = body['servers']
         self.assertEqual([], servers)
 
-    @decorators.idempotent_id('12c80a9f-2dec-480e-882b-98ba15757659')
-    def test_list_servers_by_limits(self):
-        # List servers by specifying limits
-        body = self.client.list_servers(limit=1)
-        self.assertEqual(1, len([x for x in body['servers'] if 'id' in x]))
-
     @decorators.attr(type=['negative'])
     @decorators.idempotent_id('d47c17fb-eebd-4287-8e95-f20a7e627b18')
     def test_list_servers_by_limits_greater_than_actual_count(self):