ruby 2.4

* remove tcl/tk support https://bugs.ruby-lang.org/issues/8539
* remove unnecessary patches.

Formula/ruby.rb

@@ -1,21 +1,8 @@
 class Ruby < Formula
   desc "Powerful, clean, object-oriented scripting language"
   homepage "https://www.ruby-lang.org/"
-
-  stable do
-    url "https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.3.tar.bz2"
-    sha256 "882e6146ed26c6e78c02342835f5d46b86de95f0dc4e16543294bc656594cc5b"
-
-    # Reverts an upstream commit which incorrectly tries to install headers
-    # into SDKROOT, if defined
-    # See https://bugs.ruby-lang.org/issues/11881
-    # The issue has been fixed on HEAD as of 1 Jan 2016, but has not been
-    # backported to the 2.3 branch yet and patch is still required.
-    patch do
-      url "https://raw.githubusercontent.com/Homebrew/formula-patches/ba8cc6b88e6b7153ac37739e5a1a6bbbd8f43817/ruby/mkconfig.patch"
-      sha256 "929c618f74e89a5e42d899a962d7d2e4af75716523193af42626884eaba1d765"
-    end
-  end
+  url "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0.tar.bz2"
+  sha256 "440bbbdc49d08d3650f340dccb35986d9399177ad69a204def56e5d3954600cf"
 
   bottle do
     sha256 "ecad7a8204378568faccc24bef41076b40d6ce3ab1958e679f09ca344ac9dad1" => :sierra
@@ -23,21 +10,14 @@ class Ruby < Formula
     sha256 "7f9a5afa469631f8b2c4fc914043ef2fcc2f69b790cec7a9707c80549a7f23ad" => :yosemite
   end
 
-  devel do
-    url "https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.0-preview3.tar.xz"
-    version "2.4.0-beta3"
-    sha256 "b14be2b5c80bff0d6894ae2b37afdb17a968413e70236ec860f3e2d670b4c317"
-  end
-
   head do
     url "http://svn.ruby-lang.org/repos/ruby/trunk/"
     depends_on "autoconf" => :build
   end
 
   option :universal
-  option "with-suffix", "Suffix commands with '23'"
+  option "with-suffix", "Suffix commands with '24'"
   option "with-doc", "Install documentation"
-  option "with-tcltk", "Install with Tcl/Tk support"
 
   depends_on "pkg-config" => :build
   depends_on "readline" => :recommended
@@ -46,7 +26,6 @@ class Ruby < Formula
   depends_on "libffi" => :optional
   depends_on "libyaml"
   depends_on "openssl"
-  depends_on :x11 if build.with? "tcltk"
 
   def install
     # otherwise `gem` command breaks
@@ -68,14 +47,10 @@ class Ruby < Formula
     end
 
     args << "--program-suffix=#{program_suffix}" if build.with? "suffix"
-    args << "--with-out-ext=tk" if build.without? "tcltk"
     args << "--disable-install-doc" if build.without? "doc"
     args << "--disable-dtrace" unless MacOS::CLT.installed?
     args << "--without-gmp" if build.without? "gmp"
 
-    # Reported upstream: https://bugs.ruby-lang.org/issues/10272
-    args << "--with-setjmp-type=setjmp" if MacOS.version == :lion
-
     paths = [
       Formula["libyaml"].opt_prefix,
       Formula["openssl"].opt_prefix,
@@ -124,11 +99,11 @@ class Ruby < Formula
   end
 
   def abi_version
-    "2.3.0"
+    "2.4.0"
   end
 
   def program_suffix
-    build.with?("suffix") ? "23" : ""
+    build.with?("suffix") ? "24" : ""
   end
 
   def rubygems_bindir