Removed the deprecated methods as it will only cause problems later on,
and since warn() just calls warning(), it shouldn't change anything
(Bitbake rev: a194f275235f22411cb2368f06a44f61ceb6a0f3)
Signed-off-by: Frazer Clews <frazer.clews@codethink.co.uk>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>