chore(attachment): remove unused replace code

spec/components/attachment/multiple_component_spec.rb

@@ -93,18 +93,6 @@ RSpec.describe Attachment::MultipleComponent, type: :component do
     end
   end
 
-  context 'when user can replace' do
-    let(:kwargs) { { user_can_replace: true } }
-
-    before do
-      attach_to_champ(attached_file, champ)
-    end
-
-    it 'setup controller' do
-      expect(subject).to have_selector('[data-controller=replace-attachment]').once
-    end
-  end
-
   def attach_to_champ(attached_file, champ)
     attached_file.attach(
       io: StringIO.new("x" * 2),