flake.lock: remove pi-hole

flake.lock

@@ -154,22 +154,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-pihole": {
-      "locked": {
-        "lastModified": 1703336776,
-        "narHash": "sha256-NJPoLVmBbhv3k+KUa+7JI8wAcjKPWLnUb7apjYCPvq4=",
-        "owner": "williamvds",
-        "repo": "nixpkgs",
-        "rev": "6d0adc3a5f867ecf2b8e0f2f05403cddbbd7f9cd",
-        "type": "github"
-      },
-      "original": {
-        "owner": "williamvds",
-        "ref": "add_pihole",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixpkgs_2": {
       "locked": {
         "lastModified": 1703255338,
@@ -192,8 +176,7 @@
         "deploy-rs": "deploy-rs",
         "home-manager": "home-manager_2",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_2",
-        "nixpkgs-pihole": "nixpkgs-pihole"
+        "nixpkgs": "nixpkgs_2"
       }
     },
     "systems": {