feat: remove log folder if empty

empty includes log folders with only the info.yml file in it, since it is not transferred.
info.yml only provides information about the log generation commands, so it can be safely deleted.

lib/syskit/cli/log_runtime_archive.rb

@@ -185,7 +185,24 @@ def self.transfer_dataset(
                 result = TransferDatasetResult.new(
                     complete: complete, transfer_results: transfer_results
                 )
-                log_transfer_results(dataset_path, result, logger: logger)
+                results = log_transfer_results(dataset_path, result, logger: logger)
+                remove_dataset_folder_if_empty(dataset_path, logger)
+                results
+            end
+
+            def self.remove_dataset_folder_if_empty(dataset_path, logger)
+                remaining_files = Dir.children(dataset_path) - ["info.yml"]
+                if remaining_files.empty?
+                    begin
+                        FileUtils.remove_dir(dataset_path)
+                        logger.info("Deleted empty dataset folder: #{dataset_path}")
+                    rescue StandardError => e
+                        logger.error("Failed to delete empty dataset folder " \
+                                     "#{dataset_path}: #{e.message}")
+                    end
+                else
+                    logger.info("Skipping folder deletion: #{dataset_path} is not empty")
+                end
             end
 
             # Logs the transfer dataset results