Change to remove ordered hash

Author: piotrmurach

lib/github_api.rb

@@ -88,6 +88,5 @@ def respond_to?(method_name, include_private = false)
 require_relative 'github_api/deprecation'
 require_relative 'github_api/core_ext/array'
 require_relative 'github_api/core_ext/hash'
-require_relative 'github_api/core_ext/ordered_hash'
 require_relative 'github_api/middleware'
 require_relative 'github_api/version'