class_docstr: Serialized experiment state cache.
  
  ODB with git SHAs as keys. Objects can be either SerializableExp or
  SerializableError.
code: def delete(self, rev: str):
      self.odb.delete(rev)
  
file_path: dvc/dvc/repo/experiments/cache.py
imports: import os
  from typing import TYPE_CHECKING, Optional, Union
  from dvc.fs import localfs
  from dvc.log import logger
  from dvc_objects.db import ObjectDB
  from .serialize import DeserializeError, SerializableError, SerializableExp
  from .utils import EXEC_TMP_DIR
label_desc: Use image node_id 2 for calling the ExpCache obj's underlying member method code with example usage: obj.delete(rev) without return types