Replace QMacCocoaViewContainer with QWidget::createWindowContainer

src/widgets/qocoa_mac.h

@@ -26,8 +26,6 @@ THE SOFTWARE.
 #include <QString>
 #include <QImage>
 #include <QPixmap>
-#include <QBoxLayout>
-#include <QMacCocoaViewContainer>
 
 static inline NSString* fromQString(const QString &string) {
 
@@ -51,16 +49,3 @@ static inline NSImage* fromQPixmap(const QPixmap &pixmap) {
   return [ [NSImage alloc] initWithCGImage:cgImage size:NSZeroSize];
 
 }
-
-static inline void setupLayout(NSView *cocoaView, QWidget *parent) {
-
-  parent->setAttribute(Qt::WA_NativeWindow);
-  QVBoxLayout *layout = new QVBoxLayout(parent);
-  layout->setMargin(0);
-  // FIXME
-  #pragma GCC diagnostic push
-  #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-  layout->addWidget(new QMacCocoaViewContainer(cocoaView, parent));
-  #pragma GCC diagnostic pop
-
-}