prometheus-cups-exporter: remove

This exporter is outdated, broken by design and simply shouldn't be packaged.

pkgs/servers/monitoring/prometheus/cups-exporter.nix

@@ -1,38 +0,0 @@
-{ lib, fetchFromGitHub, python3Packages, nixosTests }:
-
-python3Packages.buildPythonApplication rec {
-  pname = "prometheus-cups-exporter-unstable";
-  version = "2019-03-17";
-
-  format = "other";
-
-  src = fetchFromGitHub {
-    owner = "ThoreKr";
-    repo = "cups_exporter";
-    rev = "8fd1c2517e9878b7b7c73a450e5e546f437954a9";
-    sha256 = "1cwk2gbw2svqjlzgwv5wqzhq7fxwrwsrr0kkbnqn4mfb0kq6pa8m";
-  };
-
-  propagatedBuildInputs = with python3Packages; [ prometheus_client pycups ];
-
-  installPhase = ''
-    mkdir -p $out/share/
-    cp cups_exporter.py $out/share/
-  '';
-
-  fixupPhase = ''
-    makeWrapper "${python3Packages.python.interpreter}" "$out/bin/prometheus-cups-exporter" \
-          --set PYTHONPATH "$PYTHONPATH" \
-          --add-flags "$out/share/cups_exporter.py"
-  '';
-
-  passthru.tests = { inherit (nixosTests.prometheus-exporters) cups; };
-
-  meta = with lib; {
-    description = "A simple prometheus exporter for cups implemented in python";
-    homepage = "https://github.com/ThoreKr/cups_exporter";
-    license = licenses.unfree;
-    maintainers = [ maintainers.mmahut ];
-    platforms = platforms.all;
-  };
-}