diff --git a/app/helpers/markup_helper.rb b/app/helpers/markup_helper.rb
index 0891760be766a1d5fc5ad1eb71bcf368ea6aa049..4a5720e757d1e0d9bf4e1996814bb6e046f0e6d0 100644
--- a/app/helpers/markup_helper.rb
+++ b/app/helpers/markup_helper.rb
@@ -65,17 +65,6 @@ def first_line_in_markdown(object, attribute, max_chars = nil, is_todo: false, *
 
     tags = %w(a gl-emoji b strong i em pre code p span)
 
-    if Feature.disabled?(:two_line_mention_enabled, current_user)
-      includes_code = false
-
-      if is_todo
-        fragment = Nokogiri::HTML.fragment(md)
-        includes_code = fragment.css('code').any?
-
-        md = fragment
-      end
-    end
-
     context = markdown_field_render_context(object, attribute, options)
     context.reverse_merge!(truncate_visible_max_chars: max_chars || md.length)
 
@@ -91,9 +80,6 @@ def first_line_in_markdown(object, attribute, max_chars = nil, is_todo: false, *
         )
     )
 
-    if is_todo && !includes_code && Feature.disabled?(:two_line_mention_enabled, current_user)
-      text = "<span class=\"gl-relative\">\"</span>#{text}<span class=\"gl-relative\">\"</span>"
-    end
     # since <img> tags are stripped, this can leave empty <a> tags hanging around
     # (as our markdown wraps images in links)
     strip_empty_link_tags(text).html_safe
diff --git a/app/views/dashboard/todos/_todo.html.haml b/app/views/dashboard/todos/_todo.html.haml
index c54ad094883c14acdfeddd5ab78bb4114db69e87..44848448190eda32aba273ca897a4c2219012b10 100644
--- a/app/views/dashboard/todos/_todo.html.haml
+++ b/app/views/dashboard/todos/_todo.html.haml
@@ -1,5 +1,3 @@
-- two_line_mention = Feature.enabled?(:two_line_mention_enabled, current_user)
-
 %li.todo.gl-hover-border-blue-200.gl-hover-bg-blue-50.gl-hover-cursor-pointer.gl-relative{ class: "todo-#{todo.done? ? 'done' : 'pending'}", id: dom_id(todo) }
   .gl-display-flex.gl-flex-direction-column.gl-sm-flex-direction-row.gl-sm-align-items-center
     .todo-item.gl-overflow-hidden.gl-overflow-x-auto.gl-align-self-center.gl-w-full{ data: { qa_selector: "todo_item_container" } }
@@ -32,20 +30,13 @@
                 = link_to_author(todo, self_added: todo.self_added?)
               - else
                 = _('(removed)')
-              - if todo.note.present? && two_line_mention
+              - if todo.note.present?
                 \:
 
           %span.action-name{ data: { qa_selector: "todo_action_name_content" } }<
-            - if two_line_mention
-              - if !todo.note.present?
-                = todo_action_name(todo)
-                - unless todo.self_assigned?
-                  \.
-            - else
+            - if !todo.note.present?
               = todo_action_name(todo)
-              - if todo.note.present?
-                \:
-              - unless todo.note.present? || todo.self_assigned?
+              - unless todo.self_assigned?
                 \.
 
           - if todo.self_assigned?
@@ -53,9 +44,8 @@
               = todo_self_addressing(todo)
               \.
           - if todo.note.present?
-            %span.action-description{ :class => ("gl-font-style-italic" if !two_line_mention) }<
-            - max_chars = two_line_mention ? 125 : 100
-            = first_line_in_markdown(todo, :body, max_chars, is_todo: true, project: todo.project, group: todo.group)
+            %span.action-description<
+            = first_line_in_markdown(todo, :body, 125, is_todo: true, project: todo.project, group: todo.group)
 
     .todo-timestamp.gl-white-space-nowrap.gl-sm-ml-3.gl-mt-2.gl-mb-2.gl-sm-my-0.gl-px-2.gl-sm-px-0
       %span.todo-timestamp.gl-font-sm.gl-text-gray-500
diff --git a/config/feature_flags/development/two_line_mention_enabled.yml b/config/feature_flags/development/two_line_mention_enabled.yml
deleted file mode 100644
index d1862109ea54b84213861527fbd9404eb445640f..0000000000000000000000000000000000000000
--- a/config/feature_flags/development/two_line_mention_enabled.yml
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: two_line_mention_enabled
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/106689
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/385889
-milestone: '15.7'
-type: development
-group: group::project management
-default_enabled: false
diff --git a/spec/features/dashboard/todos/todos_spec.rb b/spec/features/dashboard/todos/todos_spec.rb
index dd1c5e6bd1fab63c86f9b28e1667fe8136d05cb4..06ccd16932eb9526175890ad8b790c32927842f4 100644
--- a/spec/features/dashboard/todos/todos_spec.rb
+++ b/spec/features/dashboard/todos/todos_spec.rb
@@ -156,11 +156,9 @@
     context 'when todo has a note' do
       let(:note) { create(:note, project: project, note: "Check out stuff", noteable: create(:issue, project: project)) }
       let!(:todo) { create(:todo, :mentioned, user: user, project: project, author: author, note: note, target: note.noteable) }
-      let(:two_line_mention_enabled_enabled) { true }
 
       before do
         sign_in(user)
-        stub_feature_flags(two_line_mention_enabled: two_line_mention_enabled_enabled)
         visit dashboard_todos_path
       end
 
@@ -169,14 +167,6 @@
         expect(page).to have_no_content('"Check out stuff"')
         expect(page).to have_content('Check out stuff')
       end
-
-      context 'when two_line_mention_enabled_enabled is disabled' do
-        let(:two_line_mention_enabled_enabled) { false }
-
-        it 'shows mention previews on one line' do
-          expect(page).to have_content("#{author.name} mentioned you: \"Check out stuff\"")
-        end
-      end
     end
   end