Revert "Flake devShell (#1549)"

This reverts commit 7ef9761b10.

.editorconfig

@@ -18,10 +18,6 @@ indent_style = tab
 indent_style = space
 indent_size = 2
 
-[*.nix]
-indent_style = space
-indent_size = 2
-
 [*.rb]
 indent_style = space
 indent_size = 2

.envrc

@@ -1 +0,0 @@
-use flake

.gitignore

@@ -3,7 +3,6 @@
 /stage
 /parts
 /prime
-.direnv
 .gitignore.swp
 .DS_Store
 result

flake.nix

@@ -1,36 +0,0 @@
-{
-  description = "onefetch";
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-  };
-
-  outputs = {
-    self,
-    nixpkgs,
-    ...
-  }: let
-  forAllSystems = fn: nixpkgs.lib.genAttrs [
-    "aarch64-darwin"
-    "aarch64-linux"
-    "i686-linux"
-    "x86_64-linux"
-    "x86_64-darwin"
-  ] (system: fn nixpkgs.legacyPackages.${system});
-  in {
-    devShells = forAllSystems (pkgs: {
-      default = pkgs.mkShell {
-        name = "onefetch";
-        packages = with pkgs; [
-          cargo
-          rustc
-          clippy
-          rustfmt
-          rust-analyzer
-          cmake
-        ];
-        RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
-      };
-    });
-  };
-}