code: def destroy_session(self, session_id):
      if session_id not in self.session_context:
          raise ValueError(f"session {session_id} does not exist")
      del self.session_context[session_id]
  
imports: import uuid
  from abc import ABC, abstractmethod
  from transformers import Conversation
  from mii.legacy.constants import TaskType
  from mii.legacy.grpc_related.proto import legacymodelresponse_pb2
  from mii.legacy.utils import kwarg_dict_to_proto, unpack_proto_query_kwargs
  from mii.legacy.models.utils import ImageResponse
label_desc: Use image node_id 3 for calling the TextGenerationMethods obj's underlying member method code with example usage: obj.destroy_session(session_id) without return types