The warn method is deprecated. We should use the documented warning instead.
Quoting from the python's official doc:
"""
Note: There is an obsolete method warn which is functionally identical to warning.
As warn is deprecated, please do not use it - use warning instead.
"""
(From OE-Core rev: cc771aa4b74f222f1bea38b0b50196b2fbc97ab4)
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>