update routes

config/routes/api.rb

@@ -25,8 +25,7 @@ defaults format: :json do
       resources :sprint_issues, only: [:index] do 
         collection do 
           get :statistics
-          get :project_statistics
-          get :project_polyline
+
           get :burndown_charts
           post :complete
         end
@@ -35,6 +34,8 @@ defaults format: :json do
         collection do
           get :convert
           get :issues_count
+          get :statistics
+          get :polyline
         end
       end
     end