exportarr: switch category

Applied suggestions[1] from @mweinelt and did a small refactor.

[1]: https://github.com/NixOS/nixpkgs/pull/183772#issuecomment-1237014790

pkgs/servers/monitoring/prometheus/exportarr/default.nix

@@ -12,22 +12,22 @@ buildGoModule rec {
     owner = "onedr0p";
     repo = "exportarr";
     rev = "v${version}";
-    hash = "sha256-KTuOhyBFS6fgA9N70vq+5fJIGVsgEZ7Uxls8efqLuII=";
+    sha256 = "sha256-KTuOhyBFS6fgA9N70vq+5fJIGVsgEZ7Uxls8efqLuII=";
   };
 
   vendorSha256 = "sha256-Yox3LAVbTZqsDmk45uSuKgITRz3zE+HTAKxVf9wdtjE=";
 
   subPackages = [ "cmd/exportarr" ];
 
-  ldflags = [
-    "-s"
-    "-w"
-  ] ++ lib.optionals stdenv.isLinux [
-    "-extldflags=-static"
-  ];
+  CGO_ENABLE = 0;
+
+  ldflags = [ "-s" "-w" ];
 
   tags = lib.optionals stdenv.isLinux [ "netgo" ];
 
+  # There are no tests for this package.
+  doCheck = false;
+
   meta = with lib; {
     description = "AIO Prometheus Exporter for Sonarr, Radarr or Lidarr";
     homepage = "https://github.com/onedr0p/exportarr";

pkgs/top-level/all-packages.nix

@@ -6178,7 +6178,7 @@ with pkgs;
 
   expect = callPackage ../tools/misc/expect { };
 
-  exportarr = callPackage ../servers/monitoring/exportarr { };
+  exportarr = callPackage ../servers/monitoring/prometheus/exportarr { };
 
   expliot = callPackage ../tools/security/expliot { };