remove runtime_checkable

Author: pubpub-zz

pypdf/_protocols.py

@@ -2,7 +2,7 @@
 
 from abc import abstractmethod
 from pathlib import Path
-from typing import IO, Any, Dict, List, Optional, Tuple, Union, runtime_checkable
+from typing import IO, Any, Dict, List, Optional, Tuple, Union
 
 try:
     # Python 3.8+: https://peps.python.org/pep-0586
@@ -39,7 +39,6 @@ def write_to_stream(
         ...
 
 
-@runtime_checkable
 class PdfCommonDocProtocol(Protocol):
     @property
     def pdf_header(self) -> str:
@@ -61,7 +60,6 @@ def strict(self) -> bool:
         ...
 
 
-@runtime_checkable
 class PdfReaderProtocol(PdfCommonDocProtocol, Protocol):
     @property
     @abstractmethod
@@ -74,7 +72,6 @@ def trailer(self) -> Dict[str, Any]:
         ...
 
 
-@runtime_checkable
 class PdfWriterProtocol(PdfCommonDocProtocol, Protocol):
     _objects: List[Any]
     _id_translated: Dict[int, Dict[int, int]]