make the linter happy

mitmproxy/contentviews.py

@@ -31,7 +31,6 @@ from six import BytesIO
 from mitmproxy import exceptions
 from mitmproxy.contrib import jsbeautifier
 from mitmproxy.contrib.wbxml import ASCommandResponse
-from netlib import encoding
 from netlib import http
 from netlib import multidict
 from netlib.http import url

netlib/http/message.py

@@ -322,4 +322,4 @@ class decoded(object):
         pass
 
     def __exit__(self, type, value, tb):
-        pass
+        pass

test/mitmproxy/test_contentview.py

@@ -1,6 +1,5 @@
 from mitmproxy.exceptions import ContentViewException
 from netlib.http import Headers
-from netlib import encoding
 from netlib.http import url
 from netlib import multidict