Remove no longer necessary code (#902)

Author: mauvilsa

jsonargparse/_core.py

@@ -56,7 +56,6 @@
     NSKeyError,
     get_non_meta_sorted_keys,
     is_meta_key,
-    patch_namespace,
     recreate_branches,
     remove_meta,
     split_key_leaf,
@@ -289,7 +288,6 @@ def _parse_known_args_internal(self, args=None, namespace=None, *, argcomplete:
             namespace = get_argcomplete_namespace(self, namespace)
         try:
             with (
-                patch_namespace(),
                 parser_context(parent_parser=self, lenient_check=True),
                 ActionTypeHint.subclass_arg_context(self),
                 suppress_required_actions(self),

jsonargparse/_deprecated.py

@@ -525,10 +525,6 @@ def __call__(self, absolute: bool = True) -> str:
         return self._absolute if absolute else self._relative
 
 
-class DebugException(Exception):
-    pass
-
-
 @deprecated("""
     usage_and_exit_error_handler was deprecated in v4.20.0 and will be removed
     in v5.0.0. With the removal of error_handler, there is no longer a need for

jsonargparse/_namespace.py

@@ -3,7 +3,6 @@
 import argparse
 from collections import OrderedDict
 from collections.abc import Iterator
-from contextlib import contextmanager
 from typing import Any, Optional, Union
 
 __all__ = ["Namespace"]
@@ -52,16 +51,6 @@ def recreate_branches(data, skip_keys=None):
     return new_data
 
 
-@contextmanager
-def patch_namespace():
-    namespace_class = argparse.Namespace
-    argparse.Namespace = Namespace
-    try:
-        yield
-    finally:
-        argparse.Namespace = namespace_class
-
-
 class Namespace(argparse.Namespace):
     """Extension of argparse's Namespace to support nesting and subscript access."""