Remove unused includes of Q[H/V]BoxLayout

Change-Id: Ia90b30b634281414268e00722771470f1e7b69c0
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/vcsbase/vcsbaseeditorconfig.cpp

@@ -9,7 +9,7 @@
 #include <QAction>
 #include <QComboBox>
 #include <QDebug>
-#include <QHBoxLayout>
+#include <QGridLayout>
 #include <QStringList>
 
 using namespace Utils;