Remove platform specific members

- Windows only QtCore.QWinEventNotifier
- Windows only QtAxContainer module
- Windows only QtWinExtras module
- Linux/X11 only QtX11Extras module

Author: MHendricks

CAVEATS.md

@@ -435,3 +435,49 @@ is directly using enums on Qt class names. If you used `self.EnumName` or other
 methods of accessing the enum objects the `--partial` check may find them. This is
 unable to automatically fix your code but shows you possible code that you will
 need to manually fix.
+
+
+#### Platform specific members
+
+There are several platform specific Qt members that could be exposed by Qt.py.
+Qt.py is targeted at exposing members common across all supported Qt versions
+and platforms, so we are not including them by default.
+
+- `QtCore.QWinEventNotifier`
+- `QtAxContainer.QAxBase` Available as `QAxContainer` in PyQt5/6.
+- `QtAxContainer.QAxObject` Available as `QAxContainer` in PyQt5/6.
+- `QtAxContainer.QAxWidget` Available as `QAxContainer` in PyQt5/6.
+
+
+##### Workaround
+
+They can be added to Qt.py using QtSiteConfig.
+
+
+```python
+import sys
+
+
+def update_members(members):
+    # Add windows only `QWinEventNotifier` class
+    if sys.platform == "win32":
+        members["QtCore"].append("QWinEventNotifier")
+
+        # Add the windows only QtAxContainer class
+        members["QtAxContainer"] = [
+            "QAxBase"
+            "QAxObject"
+            "QAxWidget"
+        ]
+
+def update_misplaced_members(members):
+    if sys.platform != "win32":
+        return
+
+    # Correctly map the Windows only QtAxContainer misplaced in PyQtX.
+    for binding in ("PyQt6", "PyQt5"):
+        members[binding].setdefault("__misplaced__", []).append("QAxContainer")
+        members[binding]["QAxContainer.QAxBase"] = "QtAxContainer.QAxBase"
+        members[binding]["QAxContainer.QAxObject"] = "QtAxContainer.QAxObject"
+        members[binding]["QAxContainer.QAxWidget"] = "QtAxContainer.QAxWidget"
+```