Remove docs directory, approaching self documentation

docs/sdks/ruby/example-list-buckets.rb

@@ -1,10 +0,0 @@
-#!/usr/bin/env ruby
-require 'aws-sdk'
-
-s3 = Aws::S3::Client.new(endpoint: "http://localhost:9000/",
-                         require_https_for_sse_cpk: false,
-                         region: "minio")
-resp = s3.list_buckets
-resp.buckets.each do |bucket|
-  puts "#{bucket.name} => #{bucket.creation_date}"
-end