Clean up flake.nix by removing comments and LiveKit override

Removed comments and overridden attributes for LiveKit version in flake.nix.

flake.nix

@@ -6,8 +6,6 @@
 		nixvim.url = "github:nix-community/nixvim";
 		btc-clients.url = "github:emmanuelrosa/btc-clients-nix";
 		nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-26.05";
-
-		# Bitcoin / Lightning stack — standalone flake, consumed as a module.
 		sovran-bitcoin.url = "github:naturallaw777/Sovran_Bitcoin";
 	};
 
@@ -19,25 +17,6 @@
 				system = prev.stdenv.hostPlatform.system;
 				config.allowUnfree = true;
 			};
-
-			# Pin LiveKit to 1.13.6: element-calling.nix sets
-			# rtc.advertise_internal_ip, which gives LAN callers a host candidate
-			# so calls work on Wi-Fi without the router needing NAT-hairpin. That
-			# flag is only honoured when node_ip is set manually from LiveKit
-			# v1.13.6 (mediatransportutil f234b53); nixpkgs-unstable currently
-			# ships 1.13.5. Remove this override once nixpkgs-unstable reaches
-			# >= 1.13.6.
-			livekit = prev.livekit.overrideAttrs (old: {
-				version = "1.13.6";
-				src = prev.fetchFromGitHub {
-					owner = "livekit";
-					repo = "livekit";
-					rev = "v1.13.6";
-					hash = "sha256-sUAx6ooeEUUqot5xuZv7xiQa3DdRFVULteTwYgFUzCI=";
-				};
-				vendorHash = "sha256-nOGSmoNuQQm/sIVI1HojsiS4GkbhA68uYMQ6X7d4a5Q=";
-			});
-		};
 	in
 	{
 		nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
@@ -77,14 +56,5 @@
 				];
 			};
 		};
-
-		checks.x86_64-linux = let
-			pkgs = import nixpkgs {
-				system = "x86_64-linux";
-			};
-		in {
-			# Bitcoin hardening and package checks now live in the Sovran_Bitcoin flake.
-			# Run them with: nix build github:naturallaw777/Sovran_Bitcoin#checks.x86_64-linux
-		};
 	};
 }