removing unnecessary code from override

app/overrides/presenters/blacklight/thumbnail_presenter_override.rb

@@ -1,80 +1,7 @@
 # frozen_string_literal: true
-
 module Blacklight
   class ThumbnailPresenter
-    attr_reader :document, :view_context, :view_config
-
-    # @param [SolrDocument] document
-    # @param [ActionView::Base] view_context scope for linking and generating urls
-    #                                        as well as for invoking "thumbnail_method"
-    # @param [Blacklight::Configuration::ViewConfig] view_config
-    def initialize(document, view_context, view_config)
-      @document = document
-      @view_context = view_context
-      @view_config = view_config
-    end
-
-    def render(image_options = {})
-      thumbnail_value(image_options)
-    end
-
-    ##
-    # Does the document have a thumbnail to render?
-    #
-    # @return [Boolean]
-    def exists?
-      thumbnail_method.present? ||
-        (thumbnail_field && thumbnail_value_from_document.present?) ||
-        default_thumbnail.present?
-    end
-
-    ##
-    # Render the thumbnail, if available, for a document and
-    # link it to the document record.
-    #
-    # @param [Hash] image_options to pass to the image tag
-    # @param [Hash] url_options to pass to #link_to_document
-    # @return [String]
-    def thumbnail_tag(image_options = {}, url_options = {})
-      value = thumbnail_value(image_options)
-      return value if value.nil? || url_options[:suppress_link]
-
-      view_context.link_to_document document, value, url_options
-    end
-
     private
-
-    delegate :thumbnail_field, :thumbnail_method, :default_thumbnail, to: :view_config
-
-    # @param [Hash] image_options to pass to the image tag
-    def thumbnail_value(image_options)
-      value = if thumbnail_method
-                view_context.send(thumbnail_method, document, image_options)
-              elsif thumbnail_field
-                image_url = thumbnail_value_from_document
-                view_context.image_tag image_url, image_options if image_url.present?
-              end
-
-      value || default_thumbnail_value(image_options)
-    end
-
-    def default_thumbnail_value(image_options)
-      return unless default_thumbnail
-
-      case default_thumbnail
-      when Symbol
-        view_context.send(default_thumbnail, document, image_options)
-      when Proc
-        default_thumbnail.call(document, image_options)
-      else
-        view_context.image_tag default_thumbnail, image_options
-      end
-    end
-
-    def thumbnail_value_from_document
-      Array(thumbnail_field).lazy.map { |field| retrieve_values(field_config(field)).first }.compact_blank.first
-    end
-
     # [hyc-override] Retrieve the thumbnail of a document's first file_set instead of using the default if it exists
     def retrieve_values(field_config)
       # Extract the SolrDocument from the document if it's nested
@@ -100,6 +27,8 @@ def retrieve_values(field_config)
       end
     end
 
+    # Extract the SolrDocument from the document if it's nested
+    # Prevents errors when the document is a presenter on work show pages
     def extract_solr_document(doc)
       if doc.is_a?(SolrDocument)
         doc
@@ -118,11 +47,5 @@ def needs_thumbnail_path_update?(document)
       # Check if the thumbnail path is the default or missing and file_set_ids are present
       thumbnail_path !~ %r{^/downloads/\w+\?file=thumbnail$} && file_set_ids.present?
     end
-
-    def field_config(field)
-      return field if field.is_a? Blacklight::Configuration::Field
-
-      Configuration::NullField.new(field)
-    end
   end
   end