Remove duplicate line in the getting started sample config
Remove duplicate line in the getting started sample config

prometheus/docs,Cepave/openfalcon.io,tcolgate/docs,evanphx/docs,prometheus/docs,ddfreyne/prometheus-docs,Cepave/openfalcon.io,pdbogen/docs,open-falcon/open-falcon.github.io,dln/docs,chosenken/docs,tcolgate/docs,open-falcon/open-falcon.github.io,vic3lord/docs,du2016/prometheus-docs,Cepave/openfalcon.io,vic3lord/docs,du2016/prometheus-docs,tcolgate/docs,du2016/prometheus-docs,pdbogen/docs,chosenken/docs,ChaoticMind/docs,evanphx/docs,evanphx/docs,dln/docs,ChaoticMind/docs,prometheus/docs,pdbogen/docs,chosenken/docs,dln/docs,vic3lord/docs,chosenken/docs,open-falcon/open-falcon.github.io,ChaoticMind/docs,ddfreyne/prometheus-docs,ddfreyne/prometheus-docs,ddfreyne/prometheus-docs