Remove check_indents require from advisories_spec

Remove unnecessary require statement for check_indents.

Author: jasnow

spec/advisories_spec.rb

@@ -1,7 +1,6 @@
 require 'spec_helper'
 require 'gem_advisory_example'
 require 'ruby_advisory_example'
-require 'check_indents'
 
 describe "gems" do
   Dir.glob(File.join(ROOT,'gems/*/*')) do |path|