Disable the metrics job
Disable the metrics job

We currently don't have a machine to build this job
(https://github.com/NixOS/nixos-org-configurations/issues/127) which
delays channel updates until hydra-queue-runner auto-cancels the job.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs