Remove usages of deprecated APIs of QLayout

Replaced:
  QLayout::setMargin() -> QLayout::setContentsMargins()
  QLayout::margin() -> QLayout::getContentsMargins()

Task-number: QTBUG-76491
Change-Id: If28ef6910b3afe5d04e4746b74f9362a3e3b3c8e
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/bineditor/bineditorplugin.cpp

@@ -368,7 +368,6 @@ public:
 
         auto l = new QHBoxLayout;
         auto w = new QWidget;
-        l->setMargin(0);
         l->setContentsMargins(0, 0, 5, 0);
         l->addStretch(1);
         l->addWidget(m_addressEdit);