Fixed prepare csv

hyrax/app/services/prepare_csv_from_crc_folder.rb

@@ -223,9 +223,7 @@ class PrepareCsvFromCrcFolder
 
     folders_path.each do |folder_path|
       if folder_is_session_or_modality(folder_path) == 'session'
-        folders_path.select { |item| Pathname(item).directory? }.each do |session_folder_path|
-          prepare_session_data(session_folder_path, csv, subject_source_identifier)
-        end
+        prepare_session_data(folder_path, csv, subject_source_identifier)
       else
         session = load_or_create_session_per_subject(folder_path, csv, subject_source_identifier)