meta_entity: Clean unused imports.

conservancy_beancount/plugin/meta_entity.py

@@ -17,21 +17,12 @@
 import re
 
 from . import core
-from .. import config as configmod
 from .. import data
 from .. import errors as errormod
 from ..beancount_types import (
-    MetaValueEnum,
     Transaction,
 )
 
-from typing import (
-    Any,
-    Dict,
-    Optional,
-    Set,
-)
-
 class MetaEntity(core.TransactionHook):
     METADATA_KEY = 'entity'
     HOOK_GROUPS = frozenset(['posting', 'metadata', METADATA_KEY])