don't convert TMM HTML to Markdown

...i.e. HTML _is_ allowed in certain Fulcrum metadata fields :-)

Gemfile

@@ -166,7 +166,6 @@ gem 'pragmatic_segmenter', '~> 0.3'
 gem 'prawn', '~> 2.2'
 
 gem 'redcarpet', '~> 3.5.1'
-gem 'reverse_markdown'
 
 # see HELIO-4484 and https://github.com/samvera/hyrax/pull/5961
 gem 'redlock', '>= 0.1.2', '< 2.0'

Gemfile.lock

@@ -901,8 +901,6 @@ GEM
       sass-rails
       twitter-bootstrap-rails
     retriable (3.1.2)
-    reverse_markdown (1.1.0)
-      nokogiri
     rexml (3.2.5)
     riiif (1.4.1)
       railties (>= 4.2, < 6)
@@ -1248,7 +1246,6 @@ DEPENDENCIES
   resque (~> 2.4.0)
   resque-pool
   resque-web (~> 0.0.12)
-  reverse_markdown
   riiif (= 1.4.1)
   rsolr (~> 2.0.1)
   rspec-context-private

lib/tasks/tmm/tmm_csv_monograph_create_update.rake

@@ -103,10 +103,6 @@ namespace :heliotrope do
         # in order to offer the ability to blank out metadata we need to merge in some nils
         attrs = blank_metadata.merge(attrs)
 
-        # TMM has some fields with HTML tags in it. This functionality will have to be manually tested as...
-        # part of HELIO-2298
-        attrs = maybe_convert_to_markdown(attrs)
-
         # sending new_monograph param here because of a weird FCREPO bug that affects Hyrax work *creation* only
         # https://github.com/samvera/hyrax/issues/3527
         attrs = cleanup_characters(attrs, new_monograph)
@@ -141,28 +137,6 @@ namespace :heliotrope do
     puts "***TITLE ROW HAS UNEXPECTED VALUES!*** These columns will be skipped: #{unexpecteds.join(', ')}\n\n" if unexpecteds.present?
   end
 
-  def maybe_convert_to_markdown(attrs)
-    attrs_out = {}
-    attrs.each do |key, value|
-      if value.present?
-        # TODO: maybe stop converting HTML to Markdown as HTML should work just fine in Fulcrum fields, theoretically
-        #       otherwise a check like this might be better than listing fields:
-        #       if ActionController::Base.helpers.strip_tags(value) != value
-        attrs_out[key] = if ['title', 'description'].include? key.downcase
-                           # 1) HTMLEntities is cleaning up the many HTML entity and decimal codes in the TMM HTML data
-                           # 2) the calls to gsub are getting rid of an inordinate number of non-breaking spaces,...
-                           # which appear in large numbers in the TMM data for seemingly no reason.
-                           Array(HtmlToMarkdownService.convert(HTMLEntities.new.decode(value.first.gsub(' ', ' ').gsub(' ', ' '))))
-                         else
-                           value
-                         end
-      else
-        attrs_out[key] = nil
-      end
-    end
-    attrs_out
-  end
-
   # this method expects HTMLEntities to have done its work in converting entities and decimal codes
   # TODO: this should happen somewhere else -- in RowData, or even in a before_save callback on both Monographs and FileSets?
   def cleanup_characters(attrs, new_monograph)