That's the standard info logging, The only real way to get rid of that is to use the latest pr2 build and set the log level above info.
I haven't tested it myself but dropping the latest version into the server and client mods folders (removing the old pr1 version) should allow you to use the loglevel setting.
you may be able to get away with just the server side files given that the documented changes seem to only have really affected server side.