Remove legacy banner images and banner styles settings

app/models/setting.rb

@@ -2,16 +2,10 @@ class Setting < ActiveRecord::Base
   validates :key, presence: true, uniqueness: true
 
   default_scope { order(id: :asc) }
-  scope :banner_style, -> { where("key ilike ?", "banner-style.%")}
-  scope :banner_img, -> { where("key ilike ?", "banner-img.%")}
 
   def type
     if feature_flag?
       'feature'
-    elsif banner_style?
-      'banner-style'
-    elsif banner_img?
-      'banner-img'
     else
       'common'
     end
@@ -25,14 +19,6 @@ class Setting < ActiveRecord::Base
     feature_flag? && value.present?
   end
 
-  def banner_style?
-    key.start_with?('banner-style.')
-  end
-
-  def banner_img?
-    key.start_with?('banner-img.')
-  end
-
   class << self
     def [](key)
       where(key: key).pluck(:value).first.presence