Oops, remove some remaining references to Flex

We uninstalled Flex, our Elasticsearch gem, to replace item search with direct DB queries; but I forgot these calls, oops!

I also kinda want to see about deleting the resque tasks altogether, since I'm not sure how to get Resque installed on latest rails bc there seems to be a conflict over the version of Rack? And it'd be nice to get rid of the complexity if we can.

app/models/item/create_task.rb

@@ -8,7 +8,6 @@ class Item
 
     def self.perform(id)
       Timeout::timeout(TIMEOUT_IN_SECONDS) do
-        Item.find(id).flex.sync
         expire_newest_items
       end
     end

app/models/item/destroy_task.rb

@@ -8,7 +8,6 @@ class Item
 
     def self.perform(id)
       Timeout::timeout(TIMEOUT_IN_SECONDS) do
-        Item.find(id).flex.sync
         # TODO: it's kinda ugly to reach across classes like this
         CreateTask.expire_newest_items
       end

app/models/item/update_task.rb

@@ -10,7 +10,6 @@ class Item
       Timeout::timeout(TIMEOUT_IN_SECONDS) do
         item = Item.find(id)
         expire_cache_for(item)
-        item.flex.sync
       end
     end