Remove unneeded private moc include

Doesn't play nice with unity builds

src/private/multisplitter/Separator_qwidget.cpp

@@ -20,20 +20,6 @@
 
 using namespace Layouting;
 
-namespace Layouting {
-class RubberBand : public QRubberBand
-                 , public Layouting::Widget_qwidget
-{
-Q_OBJECT
-public:
-    RubberBand(Layouting::Widget *parent)
-        : QRubberBand(QRubberBand::Line, parent ? parent->asQWidget() : nullptr)
-        , Layouting::Widget_qwidget(this) {
-    }
-};
-
-}
-
 SeparatorWidget::SeparatorWidget(Layouting::Widget *parent)
     : QWidget(parent->asQWidget())
     , Separator(parent)
@@ -108,4 +94,8 @@ Widget *SeparatorWidget::asWidget()
     return this;
 }
 
-#include <Separator_qwidget.moc>
+Layouting::RubberBand::RubberBand(Widget *parent)
+    : QRubberBand(QRubberBand::Line, parent ? parent->asQWidget() : nullptr)
+    , Layouting::Widget_qwidget(this)
+{
+}

src/private/multisplitter/Separator_qwidget.h

@@ -17,7 +17,7 @@
 #include "Widget_qwidget.h"
 #include "kddockwidgets/Qt5Qt6Compat_p.h"
 
-#include <QWidget>
+#include <QRubberBand>
 
 namespace Layouting {
 
@@ -41,6 +41,14 @@ protected:
     Widget *asWidget() override;
 };
 
+class RubberBand : public QRubberBand
+                 , public Layouting::Widget_qwidget
+{
+Q_OBJECT
+public:
+    explicit RubberBand(Layouting::Widget *parent);
+};
+
 }
 
 #endif