dnschain: remove package and NixOS module

The software is unmaintained since ~2014 and the package
can't be built anymore (issue #89205).

pkgs/development/node-packages/default.nix

@@ -39,14 +39,6 @@ let
       meta.broken = since "12";
     };
 
-    dnschain = super.dnschain.override {
-      buildInputs = [ pkgs.makeWrapper super.coffee-script ];
-      postInstall = ''
-        wrapProgram $out/bin/dnschain --suffix PATH : ${pkgs.openssl.bin}/bin
-      '';
-      meta.broken = since "14";
-    };
-
     bitwarden-cli = pkgs.lib.overrideDerivation super."@bitwarden/cli" (drv: {
       name = "bitwarden-cli-${drv.version}";
     });

pkgs/development/node-packages/node-packages.json

@@ -60,7 +60,6 @@
 , "csslint"
 , "dat"
 , "dhcp"
-, "dnschain"
 , "dockerfile-language-server-nodejs"
 , "elasticdump"
 , "elm-oracle"