hg_crecord: revert changes adding mercurial crecord

crecord is included in modern hg releases - I failed to realize this.

pkgs/applications/version-management/mercurial/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchurl, python, makeWrapper, docutils, unzip, hg-git, dulwich
-, guiSupport ? false, tk ? null, hg-crecord ? null, curses
+, guiSupport ? false, tk ? null, curses
 , ApplicationServices, cf-private }:
 
 let
@@ -37,13 +37,6 @@ stdenv.mkDerivation {
       WRAP_TK=" --set TK_LIBRARY \"${tk}/lib/${tk.libPrefix}\"
                 --set HG \"$out/bin/hg\"
                 --prefix PATH : \"${tk}/bin\" "
-    '') + (stdenv.lib.optionalString (hg-crecord != null)
-    ''
-      mkdir -p $out/etc/mercurial
-      cat >> $out/etc/mercurial/hgrc << EOF
-      [extensions]
-      crecord=${hg-crecord}/${python.sitePackages}/crecord
-      EOF
     '') +
     ''
       for i in $(cd $out/bin && ls); do

pkgs/top-level/all-packages.nix

@@ -12615,7 +12615,7 @@ let
     guiSupport = false; # use mercurialFull to get hgk GUI
   };
 
-  mercurialFull = appendToName "full" (pkgs.mercurial.override { inherit (pythonPackages) hg-crecord; guiSupport = true; });
+  mercurialFull = appendToName "full" (pkgs.mercurial.override { guiSupport = true; });
 
   merkaartor = callPackage ../applications/misc/merkaartor { };
 

pkgs/top-level/python-packages.nix

@@ -8190,35 +8190,6 @@ in modules // {
   };
 
 
-  hg-crecord = buildPythonPackage rec {
-    rev = "5cfaabfe9cb9f0a0d6837956d73127f290a213be";
-    name = "hg-crecord-${rev}";
-    disabled = isPy3k;
-
-    src = pkgs.fetchhg {
-      inherit rev;
-      url = "https://bitbucket.org/edgimar/crecord";
-      sha256 = "14x1k5k0jv3fiynpdfyp5zh4qvs4nr6qwy09chv3js3dhs5887ic";
-    };
-
-    # crecord comes as just a bare directory
-    configurePhase = " ";
-    buildPhase = "${python.executable} -m compileall crecord";
-    installPhase = ''
-      mkdir -p $out/${python.sitePackages}
-      cp -Lr crecord $out/${python.sitePackages}/
-    '';
-
-    # there ain't none
-    doCheck = false;
-
-    meta = {
-      description = "Mercurial extension for selecting graphically which files/hunk/lines to commit";
-      homepage = https://bitbucket.org/edgimar/crecord;
-    };
-  };
-
-
   docutils = buildPythonPackage rec {
     name = "docutils-0.12";