code: @BetaApi
    public final void deleteRegionOperation(ProjectRegionOperationName operation) {
  
      DeleteRegionOperationHttpRequest request =
          DeleteRegionOperationHttpRequest.newBuilder()
              .setOperation(operation == null ? null : operation.toString())
              .build();
      deleteRegionOperation(request);
    }
docs: Deletes the specified region-specific Operations resource.
  
  <p>Sample code:
  
  <pre><code>
  try (RegionOperationClient regionOperationClient = RegionOperationClient.create()) {
  ProjectRegionOperationName operation = ProjectRegionOperationName.of("[PROJECT]", "[REGION]", "[OPERATION]");
  regionOperationClient.deleteRegionOperation(operation);
  }
  </code></pre>
  
  @param operation Name of the Operations resource to delete.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails