Remove feature flag

app/controllers/projects/runners_controller.rb

@@ -52,7 +52,7 @@ class Projects::RunnersController < Projects::ApplicationController
   end
 
   def toggle_shared_runners
-    if Feature.enabled?(:disable_shared_runners_on_group, default_enabled: true) && !project.shared_runners_enabled && project.group && project.group.shared_runners_setting == 'disabled_and_unoverridable'
+    if !project.shared_runners_enabled && project.group && project.group.shared_runners_setting == 'disabled_and_unoverridable'
       return redirect_to project_runners_path(@project), alert: _("Cannot enable shared runners because parent group does not allow it")
     end
 

app/models/namespace.rb

@@ -393,7 +393,6 @@ class Namespace < ApplicationRecord
   end
 
   def changing_shared_runners_enabled_is_allowed
-    return unless Feature.enabled?(:disable_shared_runners_on_group, default_enabled: true)
     return unless new_record? || changes.has_key?(:shared_runners_enabled)
 
     if shared_runners_enabled && has_parent? && parent.shared_runners_setting == 'disabled_and_unoverridable'
@@ -402,7 +401,6 @@ class Namespace < ApplicationRecord
   end
 
   def changing_allow_descendants_override_disabled_shared_runners_is_allowed
-    return unless Feature.enabled?(:disable_shared_runners_on_group, default_enabled: true)
     return unless new_record? || changes.has_key?(:allow_descendants_override_disabled_shared_runners)
 
     if shared_runners_enabled && !new_record?

app/models/project.rb

@@ -1194,7 +1194,6 @@ class Project < ApplicationRecord
   end
 
   def changing_shared_runners_enabled_is_allowed
-    return unless Feature.enabled?(:disable_shared_runners_on_group, default_enabled: true)
     return unless new_record? || changes.has_key?(:shared_runners_enabled)
 
     if shared_runners_enabled && group && group.shared_runners_setting == 'disabled_and_unoverridable'

config/feature_flags/development/disable_shared_runners_on_group.yml

----
-name: disable_shared_runners_on_group
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/36080
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/258991
-type: development
-group: group::runner
-default_enabled: true