users: allow all users to use the posts per page setting.

app/models/user.rb

@@ -78,7 +78,6 @@ class User < ApplicationRecord
   validates_presence_of :comment_threshold
   validate :validate_sock_puppets, :on => :create, :if => -> { Danbooru.config.enable_sock_puppet_validation? }
   before_validation :normalize_blacklisted_tags
-  before_validation :set_per_page
   before_create :encrypt_password_on_create
   before_update :encrypt_password_on_update
   before_create :promote_to_admin_if_first_user
@@ -349,12 +348,6 @@ class User < ApplicationRecord
     def is_approver?
       can_approve_posts?
     end
-
-    def set_per_page
-      if per_page.nil? || !is_gold?
-        self.per_page = Danbooru.config.posts_per_page
-      end
-    end
   end
 
   module EmailMethods