[Backport] chore(qmake): remove obsolete dependency to core5compat from generator.pri

Suggested-by: Uwe Siems <[email protected]>

(cherry picked from commit MeVisLab/pythonqt@285c984)

Author: jcfr

generator/generator.pri

@@ -70,11 +70,6 @@ SOURCES += \
 
 QT += core xml
 
-greaterThan(QT_MAJOR_VERSION, 5) {
-    QT += core5compat
-    message("WARNING: Qt module core5compat for XML handling in typesystem.cpp")
-}
-
 win32-msvc.net {
         QMAKE_CXXFLAGS += /Zm500
         QMAKE_CXXFLAGS -= -Zm200