tell flake8 that type-annotation imports are okay

mitmproxy/flow/master.py

@@ -1,7 +1,7 @@
 import os
 import sys
 
-from typing import List, Optional, Set
+from typing import List, Optional, Set  # noqa
 
 from mitmproxy import controller, script, filt, models
 from mitmproxy.exceptions import FlowReadException, Kill

mitmproxy/flow/state.py

@@ -1,9 +1,9 @@
 from abc import abstractmethod, ABCMeta
 
 import six
-from typing import List
+from typing import List  # noqa
 
-from mitmproxy import models, filt
+from mitmproxy import models, filt  # noqa
 
 
 @six.add_metaclass(ABCMeta)