code: def detach_parallel(self: Learner):
      "Remove `ParallelTrainer` callback from a Learner"
      self.remove_cb(ParallelTrainer)
      return self
  
imports: from __future__ import annotations
  from .basics import *
  from .callback.progress import ProgressCallback
  from torch.nn.parallel import DistributedDataParallel, DataParallel
  from .data.load import _FakeLoader, _loaders
  from .optimizer import OptimWrapper
label_desc: Use image node_id 3 for calling a global function with example usage: detach_parallel() and returns: self