Remove GET .js format for Milestone controller

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

app/controllers/projects/milestones_controller.rb

@@ -34,11 +34,6 @@ class Projects::MilestonesController < Projects::ApplicationController
     @issues = @milestone.issues
     @users = @milestone.participants.uniq
     @merge_requests = @milestone.merge_requests
-
-    respond_to do |format|
-      format.html
-      format.js
-    end
   end
 
   def create