function removeFile(filePath) {
  return new Promise((resolve, reject) => {
    try {
      fs.unlink(filePath, err => {
        if (err) throw err;
      });
      resolve(filePath);
    } catch (err) {
      reject(err);
    }
  });
}
Remove a given file
@param {string} filePath
@returns {Promise<any>}