Remove unnecessary SSH rsa key configuration

The `HostKeyAlgorithms +ssh-rsa` setting has been removed from the SSH configuration in the default Nix file. This change simplifies the config and helps ensure compatibility with modern security practices.

modules/home/tools/ssh/default.nix

@@ -18,10 +18,6 @@ in
     home.packages = with pkgs; [ mosh ];
     programs.ssh = {
       enable = true;
-      extraConfig = ''
-        Host *
-          HostKeyAlgorithms +ssh-rsa
-      '';
     };
   };
 }