Remove attempt to set flag that no longer exists in Qt 6

The `AA_DisableWindowContextHelpButton` application attribute was used to disable the context
help button (`?` icon) from dialogs on Windows.

This attribute no longer exists in Qt 6, and as documented in the Qt 5 docs
(https://doc.qt.io/qtforpython-5/PySide2/QtCore/Qt.html#:~:text=Qt.AA_DisableWindowContextHelpButton)
it is no longer necessary in Qt 6 since the default behavior is now to hide the button.

src/main/python/main/main.py

@@ -6,7 +6,7 @@
 import logging
 from distutils.dir_util import copy_tree
 
-from PySide6.QtCore import Qt, QCoreApplication, QTranslator, QLocale, QSettings
+from PySide6.QtCore import QCoreApplication, QTranslator, QLocale, QSettings
 
 from typing import TYPE_CHECKING, cast
 
@@ -29,15 +29,6 @@
 class AppContext(ApplicationContext):  # type: ignore # 1. Subclass ApplicationContext
     REPO = "AllYarnsAreBeautiful/ayab-desktop"
 
-    def __init__(self) -> None:
-        self.configure_application()
-        super().__init__()
-
-    def configure_application(self) -> None:
-        # Remove Help Button
-        if hasattr(Qt, "AA_DisableWindowContextHelpButton"):
-            QCoreApplication.setAttribute(Qt.AA_DisableWindowContextHelpButton, True)
-
     def run(self) -> int:  # 2. Implement run()
         self.make_user_directory()
         self.configure_logger()