Remove fact panels

Why are these changes being introduced:

* We are moving to TACOS suggestions instead of fact panels
* Fact panels was an initial implementation we later extracted into
  TACOS

Relevant ticket(s):

* https://mitlibraries.atlassian.net/browse/USE-65

Document any side effects to this change:

* Not all fact panels will be replaced initially with TACOS suggestions

Author: JPrevost

README.md

@@ -93,7 +93,6 @@ See `Optional Environment Variables` for more information.
 - `BOOLEAN_OPTIONS`: comma separated list of values to present to testers on instances where `BOOLEAN_PICKER` feature is enabled.
 - `BOOLEAN_PICKER`: feature to allow users to select their preferred boolean type. If set, feature is enabled. This feature is only intended for internal team
   testing and should never be enabled in production (mostly because the UI is a mess more than it would cause harm).
-- `FACT_PANELS_ENABLED`: Comma separated list of enabled fact panels. See `/views/results.html.erb` for implemented panels/valid options. Leave unset to disable all.
 - `FILTER_ACCESS_TO_FILES`: The name to use instead of "Access to files" for that filter / aggregation.
 - `FILTER_CONTENT_TYPE`: The name to use instead of "Content type" for that filter / aggregation.
 - `FILTER_CONTRIBUTOR`: The name to use instead of "Contributor" for that filter / aggregation.

app/assets/stylesheets/partials/_panels.scss

@@ -62,17 +62,6 @@
   }
 }
 
-.fact {
-  .panel {
-    margin-top: 0;
-
-    .panel-heading {
-      margin-top: 0;
-      padding-top: 16.8px;
-    }
-  }
-}
-
 .ask-us {
   margin-top: 3rem;
   a {

app/controllers/fact_controller.rb

@@ -1,11 +1,4 @@
 module RecordHelper
-  def doi(metadata)
-    dois = metadata['identifiers']&.select { |id| id['kind'].downcase == 'doi' }
-    return unless dois.present?
-
-    dois.first['value']
-  end
-
   def date_parse(date)
     return unless date.present?
 

app/helpers/record_helper.rb

@@ -1,8 +1,4 @@
 module ResultsHelper
-  def fact_enabled?(fact_type)
-    ENV.fetch('FACT_PANELS_ENABLED', false).split(',').include?(fact_type)
-  end
-
   def results_summary(hits)
     hits.to_i >= 10_000 ? '10,000+ results' : "#{number_with_delimiter(hits)} results"
   end