code: public Observable<Void> deleteFromComputeNodeAsync(String poolId, String nodeId, String filePath) {
          return deleteFromComputeNodeWithServiceResponseAsync(poolId, nodeId, filePath).map(new Func1<ServiceResponseWithHeaders<Void, FileDeleteFromComputeNodeHeaders>, Void>() {
              @Override
              public Void call(ServiceResponseWithHeaders<Void, FileDeleteFromComputeNodeHeaders> response) {
                  return response.body();
              }
          });
      }
docs: Deletes the specified file from the compute node.
  
  @param poolId The ID of the pool that contains the compute node.
  @param nodeId The ID of the compute node from which you want to delete the file.
  @param filePath The path to the file or directory that you want to delete.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponseWithHeaders} object if successful.