removed unused import

Author: ojii

test/test_integration.py

@@ -12,7 +12,7 @@
 import hyper
 import hyper.http11.connection
 import pytest
-from mock import patch, MagicMock
+from mock import patch
 from h2.frame_buffer import FrameBuffer
 from hyper.compat import ssl
 from hyper.contrib import HTTP20Adapter