docstr: remove.
  
  Parameters
  ----------
  fname :
      if file name is provided. specific file is removed
      otherwise, The all the objects will be removed.
docstr_tok: ["remove",".","Parameters","--","--","--","--","--","fname",":","if","file","name","is","provided",".","specific","file","is","removed","otherwise",",","The","all","the","objects","will","be","removed","."]
code: def remove(self, fname=None):
      """remove.
  
      Parameters
      ----------
      fname :
          if file name is provided. specific file is removed
          otherwise, The all the objects will be removed.
      """
      raise NotImplementedError(f"Please implement the `remove` method")
  
imports: import os
  import pickle
  import tempfile
  from pathlib import Path
  from qlib.config import C
label_desc: Use image node_id 6 for calling the ObjManager obj's underlying member method code with example usage: obj.remove(fname) without return types