Ensure rake check:style lints the same files as standard RuboCop runs (#2237)

Author: larouxn

tasks/check/style.rake

@@ -1,7 +1,6 @@
 namespace :check do
   desc "Run RuboCop on bin/, lib/ and spec/"
   RuboCop::RakeTask.new(:style) do |task|
-    task.patterns = ["bin/**/*", "lib/**/*.rb", "spec/**/*.rb"]
     task.fail_on_error = false
   end
 end