# File lib/sass/plugin/compiler.rb, line 374
    def clean(individual_files = [])
      file_list(individual_files).each do |(_, css_file, sourcemap_file)|
        if File.exist?(css_file)
          run_deleting_css css_file
          File.delete(css_file)
        end
        if sourcemap_file && File.exist?(sourcemap_file)
          run_deleting_sourcemap sourcemap_file
          File.delete(sourcemap_file)
        end
      end
      nil
    end