fix: correct flake configuration and remove duplicate home-manager setup

- Update flake.nix with correct hostname (nixos) and username (l-wyatt)
- Remove channel-based home-manager imports from configuration.nix
- Eliminate duplicate home-manager.users configuration
- Ensures flake-based home-manager works properly

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

configuration.nix

@@ -8,7 +8,6 @@
   imports =
     [ # Include the results of the hardware scan.
       /etc/nixos/hardware-configuration.nix
-      <home-manager/nixos>
     ];
 
  ## Commented out as defined at the end of the page
@@ -94,9 +93,7 @@
     linger = true;
     extraGroups = [ "networkmanager" "wheel" "docker" "dialout" ];
   };
-  
-  home-manager.users.l-wyatt = import /home/l-wyatt/.config/home-manager/home.nix;
-   
+
   nixpkgs.config.allowUnfree = true;
   # List packages installed in system profile. To search, run:
   # $ nix search wget