#399

backend/app/services/preview/thumbnail_fetcher.rb

@@ -4,10 +4,6 @@ module Preview
     RASTER_IMAGE_CONTENT_TYPES = [
       'image/jpeg', 'image/png', 'image/gif', 'image/webp'
     ].freeze
-    REMOTE_IMAGE_CONTENT_TYPES = [
-      *RASTER_IMAGE_CONTENT_TYPES,
-      'image/svg+xml'
-    ].freeze
     HTML_MAX_BYTES = 1.megabyte
     NICONICO_XML_MAX_BYTES = 256.kilobytes
 
@@ -100,13 +96,7 @@ module Preview
       nil
     end
 
-    def self.allowed_remote_image_content_type?(content_type)
-      mime_type = content_type.to_s.split(';', 2).first.downcase.strip
-      REMOTE_IMAGE_CONTENT_TYPES.include?(mime_type)
-    end
-
     private_class_method :fetch_image_or_nil, :fetch_image!,
-                         :niconico_thumbnail_url,
-                         :allowed_remote_image_content_type?
+                         :niconico_thumbnail_url
   end
 end