ngrok: boneyard

ngrok 1.x has been sunset by upstream. It no longer functions for non-authenticated
users and as of April 4th will stop working entirely.

Upstream has also clarified there are no plans or intentions to make 2.x
open-source, which means we cannot carry that upgrade in core Homebrew, partially
for legal reasons.

If you wish to use the closed-source 2.x release you can still install it
via Homebrew in a couple of ways:

You can either `brew install homebrew/binary/ngrok2`
OR:
You can install it via the Caskroom, with `brew cask install ngrok`.

Closes Homebrew/homebrew#49432.

Formula/ngrok.rb

@@ -1,38 +0,0 @@
-# Please don't update this formula to the 2.x releases until those are
-# open-source and available to build from source. Ref:
-# https://github.com/Homebrew/homebrew/pull/45441
-class Ngrok < Formula
-  desc "Expose localhost to the internet and capture traffic for replay"
-  homepage "https://ngrok.com"
-  url "https://github.com/inconshreveable/ngrok/archive/1.7.1.tar.gz"
-  sha256 "ffb1ad90d5aa3c8b3a9bfd8109a71027645a78d5e61fccedd0873fee060da665"
-  revision 1
-
-  head "https://github.com/inconshreveable/ngrok.git"
-
-  bottle do
-    cellar :any_skip_relocation
-    revision 1
-    sha256 "56c524adac0a24f47400d369a330cfd55d4d46d04067296dc9bd18cf71180451" => :el_capitan
-    sha256 "48d055cb8bb673f5b4e48d80c76e2b59b6d5aae92bf7e1b3015f44c98fe42e1f" => :yosemite
-    sha256 "2c72dde1ebeb190c5d81bac44d66f98e11486a8f761ac73f796e798863cbfd35" => :mavericks
-  end
-
-  depends_on "go" => :build
-  depends_on :hg => :build
-
-  patch do
-    url "https://github.com/inconshreveable/ngrok/commit/761e6d0de87f4175b91a007951d7ca4ab12b7d04.diff"
-    sha256 "1bfc6342e1c194a7763039de8d6a1a1c3783a30f0517473248e0fccb3c71c211"
-  end
-
-  def install
-    ENV.j1
-    system "make", "release-client"
-    bin.install "bin/ngrok"
-  end
-
-  test do
-    system "#{bin}/ngrok", "version"
-  end
-end