class_docstr: SQLite3 TaskRecord backend.
docstr: Remove a record from the DB.
docstr_tok: ["Remove","a","record","from","the","DB","."]
code: def drop_record(self, msg_id):
      """Remove a record from the DB."""
      self._db.execute(
          """DELETE FROM '%s' WHERE msg_id==?""" % self.table, (msg_id,)
      )
  
imports: import json
  import os
  from datetime import datetime
  from dateutil.parser import parse
  from tornado import ioloop
  from traitlets import Dict, Instance, List, Unicode
  from ..util import ensure_timezone, extract_dates
  from .dictdb import BaseDB
label_desc: Use image node_id 12 for calling the SQLiteDB obj's underlying member method code with example usage: obj.drop_record(msg_id) without return types