title: How can you delete individual indexes on properties in an Entity?
body: <p>I know you can delete composite indexes with <code>gcloud datastore indexes cleanup</code> but what about deleting individual indexes on properties in an Entity?</p>
  <p>For example, let's say you have been indexing a property on an entity for a while, but then you decide not to anymore and upload a new version of your app that excludes it. I presume the index is still somewhere there in a table somewhere. Is there a way to clear these out?</p>