code: def time_replace_None(self, tz):
      self.ts.replace(tzinfo=None)
  
imports: from datetime import datetime
  import numpy
  import pytz
  from pandas import Timestamp
  from .tslib import _tzs
label_desc: Use image node_id 3 for calling the TimestampOps obj's underlying member method code with example usage: obj.time_replace_None(tz) without return types