QmlDesigner.PropertyEditor: Removing redundant emit

We should not emit the same signal twice.

Change-Id: Iee03d0b34e91f8f32d054582fcdee18d07be89b0
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/components/propertyeditor/qmlanchorbindingproxy.cpp

@@ -92,7 +92,6 @@ void QmlAnchorBindingProxy::setup(const QmlItemNode &fxItemNode)
     emit emitAnchorSignals();
 
     if (m_qmlItemNode.hasNodeParent()) {
-        emit itemNodeChanged();
         emit topTargetChanged();
         emit bottomTargetChanged();
         emit leftTargetChanged();