diff --git a/slack-docker.rb b/slack-docker.rb
deleted file mode 100644
index 5f8251d..0000000
--- a/slack-docker.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-class SlackDocker < Formula
-  desc "Slack integration to notify Docker events"
-  homepage "https://github.com/int128/slack-docker"
-  url "https://github.com/int128/slack-docker/releases/download/{{ env "VERSION" }}/slack-docker_darwin_amd64.zip"
-  version "{{ env "VERSION" }}"
-  sha256 "{{ sha256 .darwin_amd64_archive }}"
-
-  def install
-    bin.install "slack-docker"
-  end
-
-  test do
-    system "#{bin}/slack-docker --help"
-  end
-end