fixup conf.py

conf.py

@@ -373,8 +373,7 @@ REDIRECTIONS = []
 # rsync is used to send documentation to our web servers: we never send any
 # secret information, and using 'ssh-keyscan' causes the CI server's IP to
 # be blacklisted, so we specify "StrictHostKeyChecking=no".
-SSH_OPTS = ["StrictHostKeyChecking=no", "UserKnownHostsFile=/dev/null",
-            "IdentitiesOnly=yes"]
+SSH_OPTS = ["StrictHostKeyChecking=no", "UserKnownHostsFile=/dev/null"]
 
 SSH_OPTS = ' '.join('-o ' + opt for opt in SSH_OPTS)