Remove direnv setup, use parent.

.envrc

@@ -1 +0,0 @@
-use_nix

default.nix

@@ -1,34 +0,0 @@
-let
-  unstableTarball = fetchTarball
-    "https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz";
-  pkgs = import <nixpkgs> { };
-  unstable = import unstableTarball { };
-
-in with pkgs;
-pkgs.mkShell rec {
-  name = "rust";
-  buildInputs = [
-    entr
-    openssl
-    pkg-config
-    unstable.cargo
-    unstable.rustc
-    unstable.rustfmt
-    unstable.rust-analyzer
-    postgresql
-    diesel-cli
-  ];
-  # By default setup dev environment.
-  AWS_ACCESS_KEY_ID = "0BO8BCZZXV3SFZ1B43W1";
-  AWS_SECRET_ACCESS_KEY = "x6SjXJZuP1tMzxH/a6xEFDcMw4XB8qCfRPNbuGzN";
-  DATABASE_USER = "comics_devel";
-  DATABASE_NAME = "comics_devel";
-  DATABASE_HOST = "postgres.h.xinu.tv";
-  DATABASE_URL =
-    "postgres://${DATABASE_USER}@${DATABASE_HOST}/${DATABASE_NAME}";
-  PROD_DATABASE_USER = "comics";
-  PROD_DATABASE_NAME = "comics";
-  PROD_DATABASE_HOST = "postgres.h.xinu.tv";
-  PROD_DATABASE_URL =
-    "postgres://${PROD_DATABASE_USER}@${PROD_DATABASE_HOST}/${PROD_DATABASE_NAME}";
-}