The delete API lets you delete a document by ID:

DELETE /catalog/_doc/1ZFMpmoBa_wgE5i2FfWV

The response of the delete operation is as follows:

{
  "_index" : "catalog",
  "_type" : "_doc",
  "_id" : "1ZFMpmoBa_wgE5i2FfWV",
  "_version" : 4,
  "result" : "deleted",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 9,
  "_primary_term" : 1
}

This is how basic CRUD operations are performed with Elasticsearch. Please bear in mind that Elasticsearch maintains data in a completely different data structure, that is, an inverted index, using the capabilities of Apache Lucene. A relational database builds and maintains B-trees, which are more suitable for typical CRUD operations.