The adaptor is a server-side implementation that must exist anyway and
is called by the QtDBus runtime. We don't want warning on the server
side because it must call those methods to implement the client API.
Since we have the XML introspection saved in a class property anyway,
the runtime won't be inspecting the method tags to see if
Q_DECL_DEPRECATED is there, to add to the XML (which it isn't
generating).
Pick-to: 6.5
Change-Id: I9671dee8ceb64aa9b9cafffd17416596135d26ca
Reviewed-by: David Faure <david.faure@kdab.com>