remove NoneType import

PyPDF2/_reader.py

@@ -30,7 +30,6 @@
 import os
 import re
 import struct
-from types import NoneType
 import warnings
 import zlib
 from io import BytesIO
@@ -803,7 +802,7 @@ def _build_destination(
  array = array[2:]
  return Destination(title, page, typ, *array) # type: ignore
  except Exception as error:
- warnings.warn(f"Error when processing destination {title} {array}. {error}", PdfReadWarning)
+ warnings.warn(f"Error when processing destination '{title}': {error}", PdfReadWarning)
  if self.strict:
  raise
  else:
@@ -829,7 +828,7 @@ def _build_outline(self, node: DictionaryObject) -> Optional[Destination]:
  title = node["/Title"]
  dest = node["/Dest"]
 
- if isinstance(dest, ArrayObject) or isinstance(dest, NoneType):
+ if isinstance(dest, ArrayObject) or isinstance(dest, type(None)):
  outline = self._build_destination(title, dest) # type: ignore
  elif isinstance(dest, str) and dest in self._namedDests:
  outline = self._namedDests[dest]