probatron4j: migrate to boneyard (#10197)

Formula/probatron4j.rb

@@ -1,13 +0,0 @@
-class Probatron4j < Formula
-  desc "Schematron validator (use with Java 1.5 or later)"
-  homepage "http://www.probatron.org"
-  url "https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/probatron4j/probatron4j-0.7.4.zip"
-  sha256 "53f1d28d5adbc0abe8a12015a4da3a2da000e56cb1328212870d0e6fe4fe941c"
-
-  bottle :unneeded
-
-  def install
-    libexec.install "probatron.jar", "notices"
-    bin.write_jar_script libexec/"probatron.jar", "probatron"
-  end
-end

tap_migrations.json

@@ -203,6 +203,7 @@
   "polygen": "homebrew/boneyard",
   "powerline": "homebrew/boneyard",
   "pplatex": "homebrew/tex",
+  "probatron4j": "homebrew/boneyard",
   "puddletag": "homebrew/boneyard",
   "pulse": "homebrew/boneyard",
   "pyenv-pip-rehash": "homebrew/boneyard",