Remove obsolete Q_ENUMS usage

In qgfxsourceproxy_p.h, we can use the modern Q_ENUM. In
QQuickStyleOption, he usage of Q_ENUMS did not make sense to begin with,
as the class is neither a QObject nor a Q_GADGET (nor a Q_NAMESPACE).

Change-Id: I5b85a46f57033442504a27bf2e1a05d7b0aaac48
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

src/effects/qgfxsourceproxy_p.h

@@ -31,7 +31,6 @@ class QGfxSourceProxy : public QQuickItem
     Q_PROPERTY(QRectF sourceRect READ sourceRect WRITE setSourceRect NOTIFY sourceRectChanged)
     Q_PROPERTY(bool active READ isActive NOTIFY activeChanged)
     Q_PROPERTY(Interpolation interpolation READ interpolation WRITE setInterpolation NOTIFY interpolationChanged)
-    Q_ENUMS(Interpolation)
 
 public:
     enum class Interpolation {
@@ -39,6 +38,7 @@ public:
         Nearest,
         Linear
     };
+    Q_ENUM(Interpolation)
 
     QGfxSourceProxy(QQuickItem *parentItem = nullptr);
     ~QGfxSourceProxy();

src/quicknativestyle/qstyle/qquickstyleoption.h

@@ -35,7 +35,6 @@ public:
         SO_CustomBase = 0xf00,
         SO_ComplexCustomBase = 0xf000000
     };
-    Q_ENUMS(OptionType)
 
     enum StyleOptionType { Type = SO_Default };
     enum StyleOptionVersion { Version = 1 };