codeclimate/codeclimate-duplication

Checks for unnecessary require statement.

The following features are unnecessary require statement because they are already loaded.

ruby -ve 'p $LOADED_FEATURES.reject { |feature| %r|/| =~ feature }' ruby 2.2.8p477 (2017-09-14 revision 59906) [x86_64-darwin13] ["enumerator.so", "rational.so", "complex.so", "thread.rb"]

This cop targets Ruby 2.2 or higher containing these 4 features.

Example:

# bad
require 'unloaded_feature'
require 'thread'

# good
require 'unloaded_feature'