Revert "tests: Add a way to test cancelling introspection gets"
Revert "tests: Add a way to test cancelling introspection gets"

This reverts commit c90f519475e3c710128454188f5c3e5c3ad62ee0.

GNOME/gupnp,GNOME/gupnp,GNOME/gupnp,GNOME/gupnp