Remove unused Item.with_closet_hangers scope

Idk why we thought this made sense way back when? But it evidently has
no call sites now so. Goodbye!

app/models/item.rb

@@ -31,8 +31,6 @@ class Item < ApplicationRecord
 
   scope :sitemap, -> { order([:id]).limit(49999) }
 
-  scope :with_closet_hangers, -> { joins(:closet_hangers) }
-
   scope :name_includes, ->(value) {
     Item.where("name LIKE ?", "%" + sanitize_sql_like(value) + "%")
   }