Remove mpv flake (unnecessary)

mpv/flake.nix

@@ -1,24 +0,0 @@
-{
-  description = "MPV flake";
-
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
-
-  outputs = { self, nixpkgs, flake-utils}:
-    flake-utils.lib.eachDefaultSystem
-    (system:
-      let
-        pkgs = import nixpkgs {
-          inherit system;
-          config.allowUnfree = true;
-        };
-      in {
-        devShells.default = pkgs.mkShell {
-          packages = with pkgs; [ 
-            mpv
-            yt-dlp
-          ];
-        };
-      }
-    );
-}