as31: remove

I don't use this anymore and it's fairly obscure;
I don't think anyone else uses it, so remove it.

pkgs/development/compilers/as31/default.nix

@@ -1,40 +0,0 @@
-{ stdenv, fetchpatch, fetchurl, yacc }:
-
-let
-
-  version = "2.3.1";
-
-in stdenv.mkDerivation {
-  pname = "as31";
-  inherit version;
-  src = fetchurl {
-    name = "as31-${version}.tar.gz"; # Nix doesn't like the colons in the URL
-    url = "http://wiki.erazor-zone.de/_media/wiki:projects:linux:as31:as31-${version}.tar.gz";
-    sha256 = "0mbk6z7z03xb0r0ccyzlgkjdjmdzknck4yxxmgr9k7v8f5c348fd";
-  };
-
-  buildInputs = [ yacc ];
-
-  patches = [
-    (fetchpatch {
-       name = "CVE-2012-0808.patch";
-       url = "https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=655496;filename=as31-mkstemps.patch;msg=5";
-       sha256 = "0iia4wa8m141bwz4588yxb1dp2qwhapcii382sncm6jvwyngwh21";
-     })
-  ];
-
-  preConfigure = ''
-    chmod +x ./configure
-  '';
-
-  postConfigure = ''
-    rm as31/parser.c
-  '';
-
-  meta = with stdenv.lib; {
-    homepage = http://wiki.erazor-zone.de/wiki:projects:linux:as31;
-    description = "An 8031/8051 assembler by Ken Stauffer and Theo Deraadt which produces a variety of object code output formats";
-    maintainers = with maintainers; [ aneeshusa ];
-    platforms = with platforms; unix;
-  };
-}

pkgs/top-level/all-packages.nix

@@ -708,8 +708,6 @@ in
 
   artyFX = callPackage ../applications/audio/artyFX {};
 
-  as31 = callPackage ../development/compilers/as31 {};
-
   owl-lisp = callPackage ../development/compilers/owl-lisp {};
 
   ascii = callPackage ../tools/text/ascii { };