Removing the Drive upload functionality from existing encrypt function.

encryptWithoutUpload.js

/*
 * Encryption function.
 *
 * @param {string} fileName Name of the file to encrypt.
 */
async function encrypt(fileName){
  const encryptParams = new Virtru.EncryptParamsBuilder()
    .withFileSource(`./encrypt-in/${fileName}`)
    .withDisplayfileName(fileName)
    .build();
  ct = await client.encrypt(encryptParams);
  var ctString = await ct.toString();
}