Remove duplicate spec example in autolink filter

.rubocop.yml

@@ -401,7 +401,6 @@ RSpec/RepeatedExample:
     - 'spec/frontend/fixtures/merge_requests.rb'
     - 'spec/graphql/gitlab_schema_spec.rb'
     - 'spec/helpers/users_helper_spec.rb'
-    - 'spec/lib/banzai/filter/autolink_filter_spec.rb'
     - 'spec/lib/gitlab/closing_issue_extractor_spec.rb'
     - 'spec/lib/gitlab/danger/changelog_spec.rb'
     - 'spec/lib/gitlab/git/blob_spec.rb'

spec/lib/banzai/filter/autolink_filter_spec.rb

@@ -192,11 +192,6 @@ describe Banzai::Filter::AutolinkFilter do
       expect(doc.text).to eq "See <<<#{link}>>>"
     end
 
-    it 'accepts link_attr options' do
-      doc = filter("See #{link}", link_attr: { class: 'custom' })
-      expect(doc.at_css('a')['class']).to eq 'custom'
-    end
-
     it 'escapes RTLO and other characters' do
       # rendered text looks like "http://example.com/evilexe.mp3"
       evil_link = "#{link}evil\u202E3pm.exe"