Removed code from before Python 3.11.

Author: Paebbels

pyVHDLModel/Exception.py

@@ -35,9 +35,6 @@
 The module ``Exceptions`` contains all structured errors that are raised by pyVHDLModel. Besides a default error
 message in english, each exception object contains one or multiple references to the exception's context.
 """
-from sys    import version_info
-from typing import List
-
 from pyTooling.Decorators import export, readonly
 
 from pyVHDLModel.Symbol import Symbol
@@ -47,16 +44,6 @@
 class VHDLModelException(Exception):
 	"""Base-class for all exceptions (errors) raised by pyVHDLModel."""
 
-	# WORKAROUND: for Python <3.11
-	# Implementing a dummy method for Python versions before
-	__notes__: List[str]
-	if version_info < (3, 11):  # pragma: no cover
-		def add_note(self, message: str) -> None:
-			try:
-				self.__notes__.append(message)
-			except AttributeError:
-				self.__notes__ = [message]
-
 
 @export
 class LibraryExistsInDesignError(VHDLModelException):