rubyPackages: remove global v8 pinning

Removes global pinning of v8 to 3.16.14 and also removes the
unreferenced package 'therubyracer'.

pkgs/development/ruby-modules/gem-config/default.nix

@@ -18,7 +18,7 @@
 # (to make gems behave if necessary).
 
 { lib, fetchurl, writeScript, ruby, kerberos, libxml2, libxslt, python, stdenv, which
-, libiconv, postgresql, v8_3_16_14, clang, sqlite, zlib, imagemagick
+, libiconv, postgresql, v8, clang, sqlite, zlib, imagemagick
 , pkgconfig , ncurses, xapian, gpgme, utillinux, tzdata, icu, libffi
 , cmake, libssh2, openssl, libmysqlclient, darwin, git, perl, pcre, gecode_3, curl
 , msgpack, qt59, libsodium, snappy, libossp_uuid, lxc, libpcap, xorg, gtk2, buildRubyGem
@@ -29,8 +29,6 @@
 }@args:
 
 let
-  v8 = v8_3_16_14;
-
   rainbow_rake = buildRubyGem {
     pname = "rake";
     gemName = "rake";
@@ -567,14 +565,6 @@ in
     buildInputs = [ freetds ];
   };
 
-  therubyracer = attrs: {
-    buildFlags = [
-      "--with-v8-dir=${v8}"
-      "--with-v8-include=${v8}/include"
-      "--with-v8-lib=${v8}/lib"
-    ];
-  };
-
   typhoeus = attrs: {
     buildInputs = [ curl ];
   };

pkgs/development/ruby-modules/with-packages/Gemfile

@@ -144,7 +144,6 @@ source 'https://rubygems.org' do
   gem 'snappy'
   gem 'sqlite3'
   gem 'taglib-ruby'
-  gem 'therubyracer'
   gem 'thrift'
   gem 'tilt'
   gem 'tiny_tds'

pkgs/top-level/ruby-packages.nix

@@ -2466,17 +2466,6 @@
     };
     version = "1.8.0";
   };
-  therubyracer = {
-    dependencies = ["libv8" "ref"];
-    groups = ["default"];
-    platforms = [];
-    source = {
-      remotes = ["https://rubygems.org"];
-      sha256 = "1g95bzs2axjglyjyj6xvsywqgr80bnzlkw7mddxx1fdrak5wni2q";
-      type = "gem";
-    };
-    version = "0.12.3";
-  };
   thor = {
     groups = ["default"];
     platforms = [];