/bans: fix undefined ordering when no params are passed.

Fixes the /bans listing being ordered randomly by default.

app/models/ban.rb

@@ -27,7 +27,6 @@ class Ban < ApplicationRecord
 
   def self.search(params)
     q = super
-    return q if params.blank?
 
     if params[:banner_name]
       q = q.where("banner_id = (select _.id from users _ where lower(_.name) = ?)", params[:banner_name].mb_chars.downcase)