Macros: Move a bit closer to standard plugin setup pattern

Change-Id: I68b04f93022a8638da558d1240c0c8b74d9a25e2
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/macros/macrooptionspage.h

@@ -39,7 +39,7 @@ class MacroOptionsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    MacroOptionsPage(QObject *parent = nullptr);
+    MacroOptionsPage();
 
     // IOptionsPage implementation
     QWidget *widget() override;