Remove travis ci (#702)
Remove travis ci (#702)

This PR closes #690
siavashs/node_exporter,joehandzik/node_exporter,prometheus/node_exporter,derekmarcotte/node_exporter,joehandzik/node_exporter,prometheus/node_exporter,prometheus/node_exporter,derekmarcotte/node_exporter,derekmarcotte/node_exporter,derekmarcotte/node_exporter,siavashs/node_exporter,joehandzik/node_exporter,siavashs/node_exporter,siavashs/node_exporter,joehandzik/node_exporter