autoconf 2.70 now invokes intltoolize, so there's no need to do it again
in this class.
(From OE-Core rev: e24ac6605aeaae42475d3f753dc9452093af5a14)
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>