fix(nix): remove unused self value

flake.nix

@@ -32,7 +32,6 @@
   };
 
   outputs = {
-    self,
     nixpkgs,
     flake-utils,
     rust-overlay,
@@ -52,7 +51,7 @@
         formatter = alejandra.defaultPackage.${system};
         packages = import ./nix/package.nix {inherit pkgs rustPlatform;};
         devShell = import ./nix/shell.nix {
-          inherit inputs pkgs self rustVersion;
+          inherit inputs pkgs rustVersion;
         };
       }
     );

nix/package.nix

@@ -3,7 +3,7 @@
   rustPlatform,
   ...
 }: let
-  cargoToml = builtins.fromTOML (builtins.readFile ../Cargo.toml);
+  cargoToml = fromTOML (builtins.readFile ../Cargo.toml);
   name = cargoToml.package.name;
   version = cargoToml.package.version;
   rustBuild = rustPlatform.buildRustPackage {

nix/shell.nix

@@ -1,7 +1,6 @@
 {
   inputs,
   pkgs,
-  self,
   rustVersion,
   ...
 }: