Returns:
         pruned version of tensor "t".
remove(module)
  Removes the pruning reparameterization from a module. The pruned
  parameter named "name" remains permanently pruned, and the
  parameter named "name+'_orig'" is removed from the parameter
  list. Similarly, the buffer named "name+'_mask'" is removed from
  the buffers.

  Note:

    Pruning itself is NOT undone or reversed!
