QVariant::setValue(T&&): remove a facually incorrect comment

The function template is constrained in the template-initializer to
only rvalues, therefore this overload is never instantiated for
lvalue.

Amends 79ae79d05c65019233cf9ae9e77ef59d90e75ac2.

Pick-to: 6.7
Change-Id: If0260799fa233eba1ccb3545b9d053496901fc2e
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 297bc0fb306954dbdf34d80017055b6924315d81)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/corelib/kernel/qvariant.h

@@ -552,9 +552,8 @@ public:
             return QVariant();
         QMetaType mt = QMetaType::fromType<Type>();
         mt.registerType(); // we want the type stored in QVariant to always be registered
-        // T is a forwarding reference, so if T satifies the enable-ifery,
-        // we get this overload even if T is an lvalue reference and thus must check here
-        // Moreover, we only try to move if the type is actually moveable and not if T is const
+
+        // We only try to move if the type is actually moveable and not if T is const
         // as in const int i; QVariant::fromValue(std::move(i));
         if constexpr (std::conjunction_v<std::is_move_constructible<Type>, std::negation<std::is_const<T>>>)
             return moveConstruct(QMetaType::fromType<Type>(), std::addressof(value));