QHeaderView: remove unused include, add missing include

Remove unused include of qtableview.h in the source - this also fixes
the compilation with feature_tableview = OFF.
Move the missing include of qlist.h into the header.

Change-Id: Ie443cf6f3bf6b76dedc994bf1b8c16daebf9022d
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit e0130876ba376faf681b80d4a7dbb20a5e3c3bdb)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 03d478d5a9cd4ded7a72057d7070fd047b84c195)

src/widgets/itemviews/qheaderview.cpp

@@ -2,7 +2,6 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "qheaderview.h"
-#include "qtableview.h"
 
 #include <qabstractitemdelegate.h>
 #include <qapplication.h>
@@ -10,7 +9,6 @@
 #include <qbrush.h>
 #include <qdebug.h>
 #include <qevent.h>
-#include <qlist.h>
 #include <qpainter.h>
 #include <qscrollbar.h>
 #include <qstyle.h>

src/widgets/itemviews/qheaderview.h

@@ -6,6 +6,7 @@
 
 #include <QtWidgets/qtwidgetsglobal.h>
 #include <QtWidgets/qabstractitemview.h>
+#include <QtCore/qlist.h>
 
 QT_REQUIRE_CONFIG(itemviews);