nixos/tracker: Remove subcommandPackages option

The TRACKER_CLI_SUBCOMMANDS_DIR env is superseded by TRACKER_CLI_DIR env in
https://github.com/GNOME/tinysparql/commit/d14c3bb0afb98be9e10cc5d9c05baddff5c5790e

The TRACKER_CLI_DIR env is then removed in
https://github.com/GNOME/tinysparql/commit/3a86e86c9d812aeeece2b7236f2e4223dcbd3d91
with the commit message "we do no longer expect this CLI to be extended by external
projects".

Also tracker-miners (localsearch) now provides its own cli tool:
https://gitlab.gnome.org/GNOME/localsearch/-/commit/a8989f4378f1f7f82a2d6b16aa5b22f866f099ec

nixos/modules/services/desktops/gnome/tracker-miners.nix

@@ -37,8 +37,6 @@
 
     systemd.packages = [ pkgs.tracker-miners ];
 
-    services.gnome.tracker.subcommandPackages = [ pkgs.tracker-miners ];
-
   };
 
 }

nixos/modules/services/desktops/gnome/tracker.nix

@@ -11,6 +11,14 @@ in
     maintainers = lib.teams.gnome.members;
   };
 
+  imports = [
+    (lib.mkRemovedOptionModule [ "services" "gnome" "tracker" "subcommandPackages" ] ''
+      This option is broken since 3.7 and since 3.8 tracker (tinysparql) no longer expect
+      CLI to be extended by external projects, note that tracker-miners (localsearch) now
+      provides its own CLI tool.
+    '')
+  ];
+
   ###### interface
 
   options = {
@@ -26,15 +34,6 @@ in
         '';
       };
 
-      subcommandPackages = lib.mkOption {
-        type = lib.types.listOf lib.types.package;
-        default = [ ];
-        internal = true;
-        description = ''
-          List of packages containing tracker3 subcommands.
-        '';
-      };
-
     };
 
   };
@@ -50,17 +49,6 @@ in
 
     systemd.packages = [ pkgs.tracker ];
 
-    environment.variables = {
-      TRACKER_CLI_SUBCOMMANDS_DIR =
-        let
-          subcommandPackagesTree = pkgs.symlinkJoin {
-            name = "tracker-with-subcommands-${pkgs.tracker.version}";
-            paths = [ pkgs.tracker ] ++ cfg.subcommandPackages;
-          };
-        in
-        "${subcommandPackagesTree}/libexec/tracker3";
-    };
-
   };
 
 }