Mailtrap: remove test_send_with_recipients_refused

Author: cahna

tests/test_mailtrap_backend.py

@@ -105,15 +105,6 @@ def test_send_with_invalid_api_token(self):
         with self.assertRaises(AnymailAPIError):
             self.message.send()
 
-    @unittest.skip("TODO: is this test correct/necessary?")
-    def test_send_with_recipients_refused(self):
-        """Test sending an email with all recipients refused"""
-        self.set_mock_response(
-            status_code=400, raw=b'{"error": "All recipients refused"}'
-        )
-        with self.assertRaises(AnymailRecipientsRefused):
-            self.message.send()
-
     def test_send_with_serialization_error(self):
         """Test sending an email with a serialization error"""
         self.message.extra_headers = {