code: function deleteFile(req, res) {
  		var rest = req.params["0"];
  		var file = fileUtil.getFile(req, rest);
  		fileUtil.withStatsAndETag(file.path, function(error, stats, etag) {
  			var callback = function(error) {
  				if (error) {
  					return writeError(500, res, error);
  				}
  				sendStatus(204, res);
  			};
  			var ifMatchHeader = req.headers['if-match'];
  			if (error && error.code === 'ENOENT') {
  				return sendStatus(204, res);
  			} else if (error) {
  				writeError(500, res, error);
  			} else if (ifMatchHeader && ifMatchHeader !== etag) {
  				return sendStatus(412, res);
  			} else if (stats.isDirectory()) {
  				fileUtil.rumRuff(file.path, callback);
  			} else {
  				fs.unlink(file.path, callback);
  			}
  		});
  	}
docs: For file delete.