Remove __melange_queries logging
It causes the local instance to become very slow, as it has to pickle
all queries. A better solution would be to store them in the per
request value store and then add middleware to store that data at
end-of-request.
A list of bugs is available in the Google App Engine SDK project on Google Code.
The issue tracker is at http://code.google.com/p/googleappengine/issues/.