type hints: remove QModelIndex.constInternalPointer

Change-Id: I204fe9a3716de359a5d75629c6757d2045e78f43
Fixes: PYSIDE-3036
Pick-to: 6.8
Reviewed-by: Cristian Maureira-Fredes <[email protected]>

Author: cmaureir

sources/pyside6/PySide6/QtCore/typesystem_core_common.xml

@@ -1334,6 +1334,8 @@
             <insert-template name="return_internal_pointer" />
         </inject-code>
     </modify-function>
+    <!-- Remove  const variation in favor of using internalPointer -->
+    <modify-function signature="constInternalPointer()const" remove="all"/>
     <modify-function signature="operator QModelIndex()const">
         <modify-argument index="return">
             <parent index="this" action="add"/>