retrieval: remove metric namespaces
retrieval: remove metric namespaces

yanghongkjxy/prometheus,SaltedMan/prometheus-annotated,PrFalken/prometheus,AlekSi/prometheus,yanghongkjxy/prometheus,Stackdriver/stackdriver-prometheus,GoogleCloudPlatform/prometheus,gottwald/prometheus,agaoglu/prometheus,alileza/prometheus,kangwoo/prometheus,tomwilkie/prometheus,keegancsmith/prometheus,SaltedMan/prometheus-annotated,gottwald/prometheus,agaoglu/prometheus,kangwoo/prometheus,Colstuwjx/prometheus,dsymonds/prometheus,JavierZunzunegui/prometheus,slok/prometheus,Conorbro/prometheus,PrFalken/prometheus,SaltedMan/prometheus-annotated,dsymonds/prometheus,amorken/prometheus,gottwald/prometheus,PrFalken/prometheus,brancz/prometheus,slok/prometheus,gottwald/prometheus,Colstuwjx/prometheus,agaoglu/prometheus,Gouthamve/prometheus,datajet-io/prometheus,Colstuwjx/prometheus,AlekSi/prometheus,prometheus/prometheus,amorken/prometheus,JavierZunzunegui/prometheus,amorken/prometheus,PrFalken/prometheus,dsymonds/prometheus,brancz/prometheus,prometheus/prometheus,datajet-io/prometheus,JavierZunzunegui/prometheus,agaoglu/prometheus,alileza/prometheus,yanghongkjxy/prometheus,keegancsmith/prometheus,AlekSi/prometheus,JavierZunzunegui/prometheus,kzittritsch/prometheus,kzittritsch/prometheus,GoogleCloudPlatform/prometheus,amorken/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,Colstuwjx/prometheus,SaltedMan/prometheus-annotated,tomwilkie/prometheus,kzittritsch/prometheus,Conorbro/prometheus,prometheus/prometheus,keegancsmith/prometheus,slok/prometheus,kzittritsch/prometheus,tomwilkie/prometheus,Stackdriver/stackdriver-prometheus,Conorbro/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,dsymonds/prometheus,kangwoo/prometheus,datajet-io/prometheus,alileza/prometheus,AlekSi/prometheus,brancz/prometheus,prometheus/prometheus,datajet-io/prometheus,yanghongkjxy/prometheus,prometheus/prometheus,alileza/prometheus,keegancsmith/prometheus,brancz/prometheus,slok/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,alileza/prometheus,kangwoo/prometheus,Stackdriver/stackdriver-prometheus,tomwilkie/prometheus,Gouthamve/prometheus,Stackdriver/stackdriver-prometheus,Conorbro/prometheus