Removed flatpak from flake

flake.lock

@@ -58,22 +58,6 @@
         "type": "github"
       }
     },
-    "flatpaks": {
-      "locked": {
-        "lastModified": 1748869541,
-        "narHash": "sha256-TkH+duF/+En9wfi7cs+v37Cy536RIqtSpwzA6G7Qf7E=",
-        "owner": "GermanBread",
-        "repo": "declarative-flatpak",
-        "rev": "7da730958a48c7c5f53dd48509767851c88a4774",
-        "type": "github"
-      },
-      "original": {
-        "owner": "GermanBread",
-        "ref": "stable-v3",
-        "repo": "declarative-flatpak",
-        "type": "github"
-      }
-    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -263,7 +247,6 @@
     },
     "root": {
       "inputs": {
-        "flatpaks": "flatpaks",
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs",
         "nixvim": "nixvim",