Revert to Qt 5.13 support
source: https://codereview.qt-project.org/c/pyside/pyside-setup/+/272581

--- sources/pyside2/PySide2/QtCore/typesystem_core_common.xml.ORIG
+++ sources/pyside2/PySide2/QtCore/typesystem_core_common.xml
@@ -2830,7 +2830,9 @@
     <include file-name="qobjectdefs.h" location="global"/>
   </value-type>
 
-  <object-type name="QMessageLogContext"/>
+  <object-type name="QMessageLogContext">
+    <modify-function signature="copy(const QMessageLogContext &amp;)" remove="all"/>
+  </object-type>
 
   <value-type name="QMetaMethod">
     <enum-type name="Access"/>