Remove coverage_fuzzing_mr_widget feature flag

* Remove YML, usages, and update unit tests

Remove feature flag reference from controller spec

config/feature_flags/development/coverage_fuzzing_mr_widget.yml

----
-name: coverage_fuzzing_mr_widget
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/43545
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/257839
-milestone: '13.6'
-type: development
-group: group::fuzz testing
-default_enabled: true

ee/app/assets/javascripts/vue_shared/security_reports/grouped_security_reports_app.vue

@@ -8,7 +8,6 @@ import ArtifactDownload from './components/artifact_download.vue';
 import { LOADING } from '~/reports/constants';
 import { securityReportTypeEnumToReportType } from './constants';
 import { vulnerabilityModalMixin } from './mixins/vulnerability_modal_mixin';
-import glFeatureFlagsMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 import ReportSection from '~/reports/components/report_section.vue';
 import SummaryRow from '~/reports/components/summary_row.vue';
 import Tracking from '~/tracking';
@@ -50,7 +49,7 @@ export default {
   directives: {
     'gl-modal': GlModalDirective,
   },
-  mixins: [securityReportsMixin, vulnerabilityModalMixin(), glFeatureFlagsMixin()],
+  mixins: [securityReportsMixin, vulnerabilityModalMixin()],
   apollo: {
     dastSummary: {
       query: securityReportSummaryQuery,
@@ -295,8 +294,7 @@ export default {
       return this.enabledReports.apiFuzzing;
     },
     hasCoverageFuzzingReports() {
-      // TODO: Remove feature flag in https://gitlab.com/gitlab-org/gitlab/-/issues/257839
-      return this.enabledReports.coverageFuzzing && this.glFeatures.coverageFuzzingMrWidget;
+      return this.enabledReports.coverageFuzzing;
     },
     hasSastReports() {
       return this.enabledReports.sast;

ee/app/controllers/ee/projects/merge_requests_controller.rb

@@ -11,7 +11,6 @@ module EE
         before_action only: [:show] do
           push_frontend_feature_flag(:anonymous_visual_review_feedback)
           push_frontend_feature_flag(:missing_mr_security_scan_types, @project)
-          push_frontend_feature_flag(:coverage_fuzzing_mr_widget, @project, default_enabled: true)
         end
 
         before_action :whitelist_query_limiting_ee_merge, only: [:merge]

ee/app/views/projects/merge_requests/show.html.haml

@@ -20,6 +20,6 @@
     window.gl.mrWidgetData.sast_comparison_path = '#{sast_reports_project_merge_request_path(@project, @merge_request) if @project.feature_available?(:sast)}'
     window.gl.mrWidgetData.dast_comparison_path = '#{dast_reports_project_merge_request_path(@project, @merge_request) if @project.feature_available?(:dast)}'
     window.gl.mrWidgetData.secret_scanning_comparison_path = '#{secret_detection_reports_project_merge_request_path(@project, @merge_request) if @project.feature_available?(:secret_detection)}'
-    window.gl.mrWidgetData.coverage_fuzzing_comparison_path = '#{coverage_fuzzing_reports_project_merge_request_path(@project, @merge_request) if @project.feature_available?(:coverage_fuzzing) && Feature.enabled?(:coverage_fuzzing_mr_widget, @project, default_enabled: true)}'
+    window.gl.mrWidgetData.coverage_fuzzing_comparison_path = '#{coverage_fuzzing_reports_project_merge_request_path(@project, @merge_request) if @project.feature_available?(:coverage_fuzzing)}'
     window.gl.mrWidgetData.api_fuzzing_comparison_path = '#{api_fuzzing_reports_project_merge_request_path(@project, @merge_request) if @project.feature_available?(:api_fuzzing)}'
 

ee/spec/frontend/vue_shared/security_reports/grouped_security_reports_app_spec.js

@@ -103,7 +103,6 @@ describe('Grouped security reports app', () => {
       },
       store: appStore(),
       provide: {
-        glFeatures: { coverageFuzzingMrWidget: true },
         ...provide,
       },
     });
@@ -430,27 +429,20 @@ describe('Grouped security reports app', () => {
   });
 
   describe('coverage fuzzing reports', () => {
-    describe.each([true, false])('given featureEnabled is %s', (shouldShowFuzzing) => {
-      beforeEach(() => {
-        createWrapper(
-          {
-            ...props,
-            enabledReports: {
-              coverageFuzzing: true,
-            },
-          },
-          {},
-          {
-            glFeatures: { coverageFuzzingMrWidget: shouldShowFuzzing },
+    beforeEach(() => {
+      createWrapper(
+        {
+          ...props,
+          enabledReports: {
+            coverageFuzzing: true,
           },
-        );
-      });
+        },
+        {},
+      );
+    });
 
-      it(`${shouldShowFuzzing ? 'renders' : 'does not render'}`, () => {
-        expect(wrapper.find('[data-qa-selector="coverage_fuzzing_report"]').exists()).toBe(
-          shouldShowFuzzing,
-        );
-      });
+    it('renders', () => {
+      expect(wrapper.find('[data-qa-selector="coverage_fuzzing_report"]').exists()).toBe(true);
     });
   });