multirust: remove (#11810)

Formula/multirust.rb

@@ -1,32 +0,0 @@
-class Multirust < Formula
-  desc "Manage multiple Rust installations"
-  homepage "https://github.com/brson/multirust"
-  # Use the tag instead of the tarball to get submodules
-  url "https://github.com/brson/multirust.git",
-      :tag => "0.8.0",
-      :revision => "8654d1c07729e961c172425088c451509557ef32"
-  revision 1
-
-  head "https://github.com/brson/multirust.git"
-
-  bottle do
-    cellar :any_skip_relocation
-    sha256 "4e637caa68fca005e21846abb579a7487df02e3413f32efb01885a2c5e1746e6" => :sierra
-    sha256 "18f1e661ce701e74f18d525a75e6c4ceb6e82f4096e77354452acec76593d43c" => :el_capitan
-    sha256 "b7eb9f2d07493cda17eb49e9b79654c1f0ce4c60cd22b0e53e6b60469e3d32de" => :yosemite
-    sha256 "26ad5ec92fbf20e556bffd4a73fdd7ce968db17c9078f626c497a91897fad4c7" => :mavericks
-  end
-
-  depends_on :gpg => [:recommended, :run]
-
-  conflicts_with "rust", :because => "both install rustc, rustdoc, cargo, rust-lldb, rust-gdb"
-
-  def install
-    system "./build.sh"
-    system "./install.sh", "--prefix=#{prefix}"
-  end
-
-  test do
-    system bin/"multirust", "show-default"
-  end
-end

Formula/rust.rb

@@ -41,8 +41,6 @@ class Rust < Formula
   depends_on "openssl"
   depends_on "libssh2"
 
-  conflicts_with "multirust", :because => "both install rustc, rustdoc, cargo, rust-lldb, rust-gdb"
-
   # According to the official readme, GCC 4.7+ is required
   fails_with :gcc_4_0
   fails_with :gcc