Bug 1045519 - [Loop] In case the other party terminates the call, I will not get notified with "Call terminated"

See bug https://bugzilla.mozilla.org/show_bug.cgi?id=1045519 please.
Could we remove https://github.com/mozilla-b2g/firefoxos-loop-client/pull/114/files#diff-2fbba884ef4a966212c06b83fa8ebd85R274 then?