ecj: delete (#28368)

Formula/ecj.rb

@@ -1,30 +0,0 @@
-# This formula is intended to be used by gcc formulae with java support.
-
-class Ecj < Formula
-  desc "Standalone version of the Eclipse Java compiler"
-  homepage "https://gcc.gnu.org/"
-  url "https://sourceware.org/pub/java/ecj-4.9.jar"
-  mirror "https://mirrors.kernel.org/sources.redhat.com/java/ecj-4.9.jar"
-  sha256 "9506e75b862f782213df61af67338eb7a23c35ff425d328affc65585477d34cd"
-
-  bottle :unneeded
-
-  def install
-    (share/"java").install "ecj-#{version}.jar" => "ecj.jar"
-  end
-
-  test do
-    (testpath/"Hello.java").write <<~EOS
-      class Hello
-      {
-        public static void main(String[] args)
-        {
-          System.out.println("Hello Homebrew");
-        }
-      }
-    EOS
-    system "java", "-cp", share/"java/ecj.jar", "org.eclipse.jdt.internal.compiler.batch.Main", "Hello.java"
-    assert_predicate testpath/"Hello.class", :exist?, "Failed to compile Java program!"
-    assert_equal "Hello Homebrew\n", shell_output("java Hello")
-  end
-end