Move user delete check to front of screenshot worker

workers/screenshot_worker.rb

@@ -11,6 +11,9 @@ class ScreenshotWorker
 
   def perform(username, path)
 
+    site = Site[username: username]
+    return if site.is_deleted
+
     queue = Sidekiq::Queue.new self.class.sidekiq_options_hash['queue']
     logger.info "JOB ID: #{jid} #{username} #{path}"
     queue.each do |job|
@@ -31,9 +34,6 @@ class ScreenshotWorker
       scheduled_job.delete
     end
 
-    site = Site[username: username]
-    return if site.is_deleted
-
     path = "/#{path}" unless path[0] == '/'
 
     uri = Addressable::URI.parse $config['screenshot_urls'].sample