chore(precheck): use magic from nixpkgs

I updated magic to 8.3.447 (NixOS/nixpkgs#267187), so we can now just use the upstream magic package instead of manually rebuilding it

precheck/default.nix

@@ -1,12 +1,11 @@
-{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/f2bd8adf7b78d7616b52d0ef08865c7c2fcf189d.tar.gz")
+{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/8f7a6554c058bfdae00f4fb36f5cd52838f410e7.tar.gz")
     { }
-, magic ? import ./nix/magic.nix { inherit pkgs; }
 ,
 }:
 
 pkgs.mkShell {
   buildInputs = [
     pkgs.klayout
-    magic
+    pkgs.magic-vlsi
   ];
 }

precheck/nix/magic.nix

@@ -1,86 +0,0 @@
-# Copyright 2023 Efabless Corporation
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Copyright (c) 2003-2023 Eelco Dolstra and the Nixpkgs/NixOS contributors
-
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-{ pkgs ? import <nixpkgs> { }
-,
-}:
-
-with pkgs; clangStdenv.mkDerivation rec {
-  name = "magic-vlsi";
-  rev = "11080465ad3759d4bdb3936026c797644c6f7f0b";
-
-  src = fetchFromGitHub {
-    owner = "RTimothyEdwards";
-    repo = "magic";
-    inherit rev;
-    sha256 = "sha256-zRIS8tFT52soPsySZdxVOX+5Pu8xriZeur0Gh8kdaXk=";
-  };
-
-  nativeBuildInputs = [ python3 tcsh gnused ];
-
-  # So here's the situation:
-  ## * Magic will not compile without X11 libraries, even for headless use.
-  ## * Magic with Cairo will use Cairo-X11 headers that are not available on
-  ## pre-built Mac versions of Cairo which presume you're going to use Quartz.
-  ## -> Unintuitively, that means X11 libraries must be present on Mac, but not
-  ## Cairo.
-  buildInputs = [
-    xorg.libX11
-    m4
-    mesa_glu
-    ncurses
-    tcl
-    tcsh
-    tk
-  ] ++ lib.optionals stdenv.isLinux [ cairo ];
-
-  configureFlags = [
-    "--with-tcl=${tcl}"
-    "--with-tk=${tk}"
-    "--disable-werror"
-  ];
-
-  preConfigure = ''
-    # nix shebang fix
-    patchShebangs ./scripts
-
-    # "Precompute" git rev-parse HEAD
-    sed -i 's@`git rev-parse HEAD`@${rev}@' ./scripts/defs.mak.in
-  '';
-
-  NIX_CFLAGS_COMPILE = "-Wno-implicit-function-declaration -Wno-parentheses -Wno-macro-redefined";
-
-  # Fairly sure this is deprecated?
-  enableParallelBuilding = true;
-}