fix crashes in script component

that code was guarded by !PLATFORM(QT) which I overlooked and
unconditionalized leaving the code, deleting the data should not
be done

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

src/3rdparty/javascriptcore/JavaScriptCore/wtf/ThreadSpecific.h

@@ -140,8 +140,6 @@ inline void ThreadSpecific<T>::destroy(void* ptr)
 
     data->value->~T();
     fastFree(data->value);
-
-    delete data;
 #endif
 }