diff --git a/README.md b/README.md
index 90c7f86..baea159 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,6 @@ and open `http://127.0.0.1:8000/` in your browser.
 To upload the site:
 
 ```console
-$ gem install aws-sdk
 $ export AWS_ACCESS_KEY_ID=...
 $ export AWS_SECRET_ACCESS_KEY=...
 $ tools/upload
diff --git a/tools/upload-ruby-old b/tools/upload-ruby-old
deleted file mode 100755
index b1eda68..0000000
--- a/tools/upload-ruby-old
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/usr/bin/env ruby
-
-# Upload the contents in public/ to the S3 bucket from which we serve
-# gobyexample.com. We use this instead of `aws iam sync` because that command
-# doesn't correctly guess the text/html mime time of the extension-less files.
-# We didn't write this in Go because we had already written it in Ruby for
-# another website and didn't want to re-write it.
-
-require "aws-sdk"
-require "set"
-
-s3 = Aws::S3::Client.new(
-  region: "us-east-1",
-  credentials: Aws::Credentials.new(ENV["AWS_ACCESS_KEY_ID"], ENV["AWS_SECRET_ACCESS_KEY"])
-)
-
-# (Re-)upload each file to S3. We're not worried about what's currently there.
-Dir.glob("./public/**/**").each do |local_path|
-  next if File.directory?(local_path)
-
-  # Derive final path.
-  s3_path = local_path.sub("./public/", "")
-
-  # Infer content type, including for HTML files that need pretty URLs.
-  content_type =
-    case s3_path
-    when /\.ico$/ then "image/x-icon"
-    when /\.png$/ then "image/png"
-    when /\.css$/ then "text/css"
-    else "text/html"
-    end
- 
-  puts("Uploading #{s3_path} (#{content_type})")
-
-  File.open(local_path, "rb") do |local_file|
-    s3.put_object(
-      bucket: "gobyexample.com",
-      key: s3_path,
-      content_type: content_type,
-      body: local_file)
-  end
-end