diff --git a/Formula/libguess.rb b/Formula/libguess.rb
deleted file mode 100644
index 9804e9f206..0000000000
--- a/Formula/libguess.rb
+++ /dev/null
@@ -1,46 +0,0 @@
-class Libguess < Formula
-  desc "Character set guessing library"
-  homepage "http://atheme.org/projects/libguess.html"
-  url "http://rabbit.dereferenced.org/~nenolod/distfiles/libguess-1.2.tar.bz2"
-  sha256 "8019a16bdc7ca9d2efbdcc1429d48d033d5053d42e45fccea10abf98074f05f8"
-
-  bottle do
-    cellar :any
-    sha256 "5de6d50300296e7913ad028c22275e773dc10d85fbef025b7b4811de7c6fe6a1" => :mojave
-    sha256 "09045b0737c259c15b0cc7e44877d85b27a9b2f8fb5919fdb311cc2ce73784df" => :high_sierra
-    sha256 "ddd983bfe42d5d862959ab0de2b27e398f149419c4b13d5ec5714925082f4c32" => :sierra
-    sha256 "a498514b576d430711723ec36937902a326b29056655cc14e66398419cfd07a9" => :el_capitan
-    sha256 "66e51f426756e9a126bc2267d6c276c5261ef6f02bac5e11c34647b39278a995" => :yosemite
-    sha256 "0aa5eda1a4ba389ef5e17e5a41cd3d076c4a3607b5a354bb80931ad07c918ab2" => :mavericks
-  end
-
-  head do
-    url "https://github.com/kaniini/libguess.git"
-
-    depends_on "autoconf" => :build
-    depends_on "automake" => :build
-  end
-
-  def install
-    system "./autogen.sh" if build.head?
-    system "./configure", "--prefix=#{prefix}"
-    system "make"
-    system "make", "install"
-  end
-
-  test do
-    (testpath/"test.c").write <<~EOS
-      #include <stdio.h>
-      #include <string.h>
-      #include <libguess.h>
-
-      int main(int argc, char **argv) {
-        const char *buf = "안녕";
-        printf("%s", libguess_determine_encoding(buf, strlen(buf), GUESS_REGION_KR));
-        return (libguess_validate_utf8(buf, strlen(buf)) == 1) ? EXIT_SUCCESS : EXIT_FAILURE;
-      }
-    EOS
-    system ENV.cc, "test.c", "-I#{include}/libguess", "-L#{lib}", "-lguess", "-o", "test"
-    assert_match "UTF-8", shell_output("./test")
-  end
-end