Remove the old nixpkgs-unstable input

This is not needed as I'm now using unstable by default.

flake.lock

@@ -69,29 +69,12 @@
         "type": "github"
       }
     },
-    "nixpkgs-unstable": {
-      "locked": {
-        "lastModified": 1729665710,
-        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "home-manager": "home-manager",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",
-        "nixpkgs-2405": "nixpkgs-2405",
-        "nixpkgs-unstable": "nixpkgs-unstable"
+        "nixpkgs-2405": "nixpkgs-2405"
       }
     }
   },

flake.nix

@@ -6,8 +6,6 @@
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
 
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
-
     nixpkgs-2405.url = "github:nixos/nixpkgs/nixos-24.05";
   };
 

nix/lib/nixos/configuration.nix

@@ -23,7 +23,6 @@ in
       outputs.overlays.additions
       outputs.overlays.modifications
       outputs.overlays.stable-packages
-      outputs.overlays.unstable-packages
     ];
   };
 

nix/lib/wsl2/default.nix

@@ -13,7 +13,6 @@ let
     overlays = [
       outputs.overlays.additions
       outputs.overlays.modifications
-      outputs.overlays.unstable-packages
     ];
   };
 

nix/modules/home-manager/git.nix

@@ -146,7 +146,7 @@
     };
   };
 
-  home.packages = with pkgs.unstable; [ git-instafix ];
+  home.packages = [ pkgs.git-instafix ];
 
   home.sessionVariables = {
     GIT_INSTAFIX_UPSTREAM = "origin/main";

nix/overlays/default.nix

@@ -17,11 +17,4 @@
       system = final.system;
     };
   };
-
-  unstable-packages = final: _prev: {
-    unstable = import inputs.nixpkgs-unstable {
-      config.allowUnfree = true;
-      system = final.system;
-    };
-  };
 }