Small doc fix

Change-Id: I349f68c4b86558aba5db4e8fbe5d876447baaeb3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

src/corelib/kernel/qmetatype.cpp

@@ -1595,12 +1595,10 @@ static QtPrivate::QMetaTypeInterface *interfaceForType(int typeId)
 }
 
 /*!
-     \fn QMetaType::QMetaType(const int typeId)
+     \fn QMetaType::QMetaType(int typeId)
      \since 5.0
 
      Constructs a QMetaType object that contains all information about type \a typeId.
-
-     \note The default parameter was added in Qt 5.15.
 */
 QMetaType::QMetaType(int typeId) : QMetaType(interfaceForType(typeId)) {}