title: Remove property from mongoose document instance
body: <p>I need to remove a property from a mongoose document instance. I've found a lot of questions that show how to remove it from the database, but that's not what I'm looking for.</p>
  
  <p>I need to pull the document down including a field to check security access, I then want to strip that field so that it doesn't get disclosed if downstream code decides to call <code>toObject()</code> and send the object back to the client.</p>
  
  <p>Any thoughts?</p>