Move project settings under /-/ scope

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

config/routes/project.rb

@@ -539,23 +539,24 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
       resources :audit_events, only: [:index]
       ## EE-specific
 
+      scope '-' do
         namespace :settings do
           get :members, to: redirect("%{namespace_id}/%{project_id}/project_members")
+
           resource :ci_cd, only: [:show, :update], controller: 'ci_cd' do
             post :reset_cache
             put :reset_registration_token
           end
-        resource :integrations, only: [:show]
 
-        resource :slack, only: [:destroy, :edit, :update] do
-          get :slack_auth
-        end
+          resource :operations, only: [:show, :update]
+          resource :integrations, only: [:show]
 
           resource :repository, only: [:show], controller: :repository do
             post :create_deploy_token, path: 'deploy_token/create'
             post :cleanup
           end
         end
+      end
 
       resources :error_tracking, only: [:index], controller: :error_tracking do
         collection do
@@ -571,10 +572,6 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
       ## EE-specific
       resources :managed_licenses, only: [:index, :show, :new, :create, :edit, :update, :destroy]
       ## EE-specific
-
-      namespace :settings do
-        resource :operations, only: [:show, :update]
-      end
     end
 
     resources(:projects,