Remove design todo button feature flag

Cleans up design_management_todo_button FF
- removes unnecessary tests
- removes UI checks
- removes yaml file
- removes conditional logic in UI
- removes the FF itself

app/assets/javascripts/design_management/components/design_sidebar.vue

@@ -71,14 +71,6 @@ export default {
     resolvedCommentsToggleIcon() {
       return this.resolvedDiscussionsExpanded ? 'chevron-down' : 'chevron-right';
     },
-    showTodoButton() {
-      return this.glFeatures.designManagementTodoButton;
-    },
-    sidebarWrapperClass() {
-      return {
-        'gl-pt-0': this.showTodoButton,
-      };
-    },
   },
   watch: {
     isResolvedCommentsPopoverHidden(newVal) {
@@ -121,9 +113,8 @@ export default {
 </script>
 
 <template>
-  <div class="image-notes" :class="sidebarWrapperClass" @click="handleSidebarClick">
+  <div class="image-notes gl-pt-0" @click="handleSidebarClick">
     <div
-      v-if="showTodoButton"
       class="gl-py-4 gl-mb-4 gl-display-flex gl-justify-content-space-between gl-align-items-center gl-border-b-1 gl-border-b-solid gl-border-b-gray-100"
     >
       <span>{{ __('To Do') }}</span>

app/controllers/projects/issues_controller.rb

@@ -44,7 +44,6 @@ class Projects::IssuesController < Projects::ApplicationController
     push_frontend_feature_flag(:vue_issuable_sidebar, project.group)
     push_frontend_feature_flag(:tribute_autocomplete, @project)
     push_frontend_feature_flag(:vue_issuables_list, project)
-    push_frontend_feature_flag(:design_management_todo_button, project, default_enabled: true)
     push_frontend_feature_flag(:vue_sidebar_labels, @project)
   end
 

config/feature_flags/development/design_management_todo_button.yml

----
-name: design_management_todo_button
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/39935
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/245074
-group: group::knowledge
-type: development
-default_enabled: true

doc/user/project/issues/design_management.md

@@ -226,37 +226,12 @@ available in the **Resolved Comment** area at the bottom of the right sidebar.
 ## Add to dos for designs
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/198439) in GitLab 13.4.
-> - It's [deployed behind a feature flag](../../feature_flags.md), enabled by default.
-> - It's enabled on GitLab.com.
-> - It's recommended for production use.
-> - For GitLab self-managed instances, GitLab administrators can opt to [disable it](#enable-or-disable-the-design-to-do-button). **(CORE ONLY)**
-
-CAUTION: **Warning:**
-This feature might not be available to you. Check the **version history** note above for details.
+> - [Feature flag removed](https://gitlab.com/gitlab-org/gitlab/-/issues/245074) in **GitLab 13.5**
 
 Add a to do for a design by clicking **Add a To-Do** on the design sidebar:
 
 ![To-Do button](img/design_todo_button_v13_4.png)
 
-### Enable or disable the design to-do button **(CORE ONLY)**
-
-The **Add a To-Do** button for Designs is under development but ready for production use. It is
-deployed behind a feature flag that is **enabled by default**.
-[GitLab administrators with access to the GitLab Rails console](../../../administration/feature_flags.md)
-can enable it.
-
-To enable it:
-
-```ruby
-Feature.enable(:design_management_todo_button)
-```
-
-To disable it:
-
-```ruby
-Feature.disable(:design_management_todo_button)
-```
-
 ## Referring to designs in Markdown
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/217160) in **GitLab 13.1**.

spec/frontend/design_management/components/design_sidebar_spec.js

@@ -43,7 +43,7 @@ describe('Design management design sidebar component', () => {
   const findNewDiscussionDisclaimer = () =>
     wrapper.find('[data-testid="new-discussion-disclaimer"]');
 
-  function createComponent(props = {}, { enableTodoButton } = {}) {
+  function createComponent(props = {}) {
     wrapper = shallowMount(DesignSidebar, {
       propsData: {
         design,
@@ -58,9 +58,6 @@ describe('Design management design sidebar component', () => {
         },
       },
       stubs: { GlPopover },
-      provide: {
-        glFeatures: { designManagementTodoButton: enableTodoButton },
-      },
     });
   }
 
@@ -80,6 +77,12 @@ describe('Design management design sidebar component', () => {
     expect(findParticipants().props('participants')).toHaveLength(1);
   });
 
+  it('renders To-Do button', () => {
+    createComponent();
+
+    expect(wrapper.find(DesignTodoButton).exists()).toBe(true);
+  });
+
   describe('when has no discussions', () => {
     beforeEach(() => {
       createComponent({
@@ -245,23 +248,4 @@ describe('Design management design sidebar component', () => {
       expect(Cookies.set).toHaveBeenCalledWith(cookieKey, 'true', { expires: 365 * 10 });
     });
   });
-
-  it('does not render To-Do button by default', () => {
-    createComponent();
-    expect(wrapper.find(DesignTodoButton).exists()).toBe(false);
-  });
-
-  describe('when `design_management_todo_button` feature flag is enabled', () => {
-    beforeEach(() => {
-      createComponent({}, { enableTodoButton: true });
-    });
-
-    it('renders sidebar root element with no top padding', () => {
-      expect(wrapper.classes()).toContain('gl-pt-0');
-    });
-
-    it('renders To-Do button', () => {
-      expect(wrapper.find(DesignTodoButton).exists()).toBe(true);
-    });
-  });
 });

spec/frontend/design_management/pages/design/__snapshots__/index_spec.js.snap

@@ -30,9 +30,19 @@ exports[`Design management design index page renders design index 1`] = `
   </div>
    
   <div
-    class="image-notes"
+    class="image-notes gl-pt-0"
   >
-    <!---->
+    <div
+      class="gl-py-4 gl-mb-4 gl-display-flex gl-justify-content-space-between gl-align-items-center gl-border-b-1 gl-border-b-solid gl-border-b-gray-100"
+    >
+      <span>
+        To Do
+      </span>
+       
+      <design-todo-button-stub
+        design="[object Object]"
+      />
+    </div>
      
     <h2
       class="gl-font-weight-bold gl-mt-0"
@@ -180,9 +190,19 @@ exports[`Design management design index page with error GlAlert is rendered in c
   </div>
    
   <div
-    class="image-notes"
+    class="image-notes gl-pt-0"
   >
-    <!---->
+    <div
+      class="gl-py-4 gl-mb-4 gl-display-flex gl-justify-content-space-between gl-align-items-center gl-border-b-1 gl-border-b-solid gl-border-b-gray-100"
+    >
+      <span>
+        To Do
+      </span>
+       
+      <design-todo-button-stub
+        design="[object Object]"
+      />
+    </div>
      
     <h2
       class="gl-font-weight-bold gl-mt-0"