Remove unused keyring test dependency (googleapis#496)

Jon Wayne Parrott · web-flow · commit bf0f27678b37 · 2018-04-23T16:17:36.000-07:00
diff --git a/tox.ini b/tox.ini
@@ -9,7 +9,6 @@ deps =
        oauth2client4: oauth2client>=4,<=5dev
        google-auth
        google-auth-httplib2
-       keyring
        mox
        pyopenssl
        pycrypto==2.6
