Revert fix for 1.7.0-rc1/2/3, netns_linux_amd.go
Revert fix for 1.7.0-rc1/2/3, netns_linux_amd.go

dockware/rpi-docker-builder,marsmensch/rpi-docker-builder,hypriot/rpi-docker-builder,marsmensch/rpi-docker-builder,moul/rpi-docker-builder,dockware/rpi-docker-builder