dev-python/pyqt6-webengine: drop unused patch

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

dev-python/pyqt6-webengine/files/pyqt6-webengine-6.8.0-qvariant.patch

@@ -1,15 +0,0 @@
-This was removed between 6.8.0.dev2411020930 and 6.8.0 final, but
-results in a build failure if missing (or at least with Qt6.8.1).
-
-qwebengineframe.sip:52:64: error: invalid use of incomplete type 'class QVariant'
---- a/sip/QtWebEngineCore/qwebengineframe.sip
-+++ b/sip/QtWebEngineCore/qwebengineframe.sip
-@@ -29,4 +29,8 @@
- %End
- 
-+%TypeCode
-+#include <QVariant>
-+%End
-+
- public:
-     bool isValid() const;