code: public void beginDelete(String resourceGroupName, String deploymentName) {
          beginDeleteWithServiceResponseAsync(resourceGroupName, deploymentName).toBlocking().single().body();
      }
docs: Deletes a deployment from the deployment history.
  A template deployment that is currently running cannot be deleted. Deleting a template deployment removes the associated deployment operations. Deleting a template deployment does not affect the state of the resource group. This is an asynchronous operation that returns a status of 202 until the template deployment is successfully deleted. The Location response header contains the URI that is used to obtain the status of the process. While the process is running, a call to the URI in the Location header returns a status of 202. When the process finishes, the URI in the Location header returns a status of 204 on success. If the asynchronous request failed, the URI in the Location header returns an error-level status code.
  
  @param resourceGroupName The name of the resource group with the deployment to delete. The name is case insensitive.
  @param deploymentName The name of the deployment to delete.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent