test-connection-error: don't check errors twice
test-connection-error: don't check errors twice

We are already using g_assert_error() to check those.

https://bugs.freedesktop.org/show_bug.cgi?id=79006

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib