README.md in sidekiq-throttled-0.5.0 vs README.md in sidekiq-throttled-0.6.0

@@ -119,11 +119,9 @@
 ## Supported Ruby Versions
 
 This library aims to support and is [tested against][travis] the following Ruby
 versions:
 
-* Ruby 2.0.0
-* Ruby 2.1.x
 * Ruby 2.2.x
 * Ruby 2.3.x
 
 
 ## Supported Sidekiq Versions