code: @Override
      public DeleteCollectionResult deleteCollection(DeleteCollectionRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteCollection(request);
      }
docs: <p>
  Deletes the specified collection. Note that this operation removes all faces in the collection. For an example,
  see <a>delete-collection-procedure</a>.
  </p>
  <p>
  This operation requires permissions to perform the <code>rekognition:DeleteCollection</code> action.
  </p>
  
  @param deleteCollectionRequest
  @return Result of the DeleteCollection operation returned by the service.
  @throws InvalidParameterException
  Input parameter violated a constraint. Validate your parameter before calling the API operation again.
  @throws AccessDeniedException
  You are not authorized to perform the action.
  @throws InternalServerErrorException
  Amazon Rekognition experienced a service issue. Try your call again.
  @throws ThrottlingException
  Amazon Rekognition is temporarily unable to process the request. Try your call again.
  @throws ProvisionedThroughputExceededException
  The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon
  Rekognition.
  @throws ResourceNotFoundException
  The collection specified in the request cannot be found.
  @sample AmazonRekognition.DeleteCollection