remove debugging code

[jasonray]

_registry: {'external-source-registry': {'beanstalk': <statman.statman.ExternalSource object at 0x1029f0d50>}, 'metric-registry': {'beanstalk.current-jobs-urgent': <statman.gauge.Gauge object at 0x102e536d0>, 'beanstalk.current-jobs-ready': <statman.gauge.Gauge object at 0x10395b2d0>, 'beanstalk.current-jobs-reserved': <statman.gauge.Gauge object at 0x10395b190>, 'beanstalk.current-jobs-delayed': <statman.gauge.Gauge object at 0x103958510>, 'beanstalk.current-jobs-buried': <statman.gauge.Gauge object at 0x10395b210>, 'beanstalk.total-jobs': <statman.gauge.Gauge object at 0x10395b150>, 'beanstalk.current-using': <statman.gauge.Gauge object at 0x10395b350>, 'beanstalk.current-watching': <statman.gauge.Gauge object at 0x10395b290>, 'beanstalk.current-waiting': <statman.gauge.Gauge object at 0x10395b390>, 'beanstalk.cmd-delete': <statman.gauge.Gauge object at 0x10395b1d0>, 'beanstalk.cmd-pause-tube': <statman.gauge.Gauge object at 0x10395b410>, 'beanstalk.pause': <statman.gauge.Gauge object at 0x10395b050>, 'beanstalk.pause-time-left': <statman.gauge.Gauge object at 0x10395b4d0>, 'kessel.message_streak_tm': <statman.stopwatch.Stopwatch object at 0x103915dd0>, 'kessel.message_streak_messages_per_s': <statman.calculation.Calculation object at 0x1038df5d0>, 'kessel.dequeue-attempts': <statman.gauge.Gauge object at 0x103915f10>, 'kessel.dequeue': <statman.gauge.Gauge object at 0x103958610>, 'kessel.message_streak_cnt': <statman.gauge.Gauge object at 0x10395b610>, 'kessel.messages.success': <statman.gauge.Gauge object at 0x1029c8590>, 'kessel.commit': <statman.gauge.Gauge object at 0x10395b650>, 'kessel.messages_processed': <statman.gauge.Gauge object at 0x10395b6d0>}}
refresh_external_sources