Delete Nix files

These files are for the 1.1 release, kinda outdated

default.nix

@@ -1,5 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-# TODO: add shell support
-pkgs.callPackage ./release.nix { }
-

release.nix

@@ -1,33 +0,0 @@
-{ stdenv, lib, fetchFromGitHub, buildGoModule
-, git
-}:
-
-buildGoModule rec {
-  pname = "mycorrhiza";
-  version = "1.1.0";
-
-  src = ./.;
-
-  # That's for a nixpkgs release or something. Mind the hashes.
-  # src = fetchFromGitHub {
-  #   owner = "bouncepaw";
-  #   repo = "mycorrhiza";
-  #   rev = "v${version}";
-  #   sha256 = "0di4msrl44jcnhck11k0r7974cjnwdyw45b3hf0s3dbwx6ijdkdd";
-  #   fetchSubmodules = true;
-  # };
-
-  vendorSha256 = "0hxcbfh55avly9gvdysqgjzh66g7rdy2l0wmy9jnlq0skpa6j0jq"; 
-  
-  subPackages = [ "." ]; 
-
-  propagatedBuildInputs = [ git ];
-
-  meta = with lib; {
-    description = "Filesystem and git-based wiki engine written in Go using mycomarkup as its primary markup language";
-    homepage = "https://github.com/bouncepaw/mycorrhiza";
-    license = licenses.agpl3;
-    # maintainers = with maintainers; [ bouncepaw ];
-    platforms = platforms.linux;
-  };
-}