Adrien Béraud authored May 26, 2017 and Guillaume Roguez committed May 26, 2017

SipIceTransport was a first implementation of a SIP
transport working over an ICE transport.
It was insecure and is now unused and unmaintained
(last actual change is from February 2015),
and deprecated by SipsIceTransport.

Remove it from the code base to speed up compilation
and avoid accidental usage by confusion with SipsIceTransport.

Also fix minor warnings in SipsIceTransport
(std::move of an rvalue).

Change-Id: I7a8ce2c0570d92bfe8bd191f2f6c8c6f2b191980
Reviewed-by: Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>