classes/image: remove obsolete MULTILIB_VENDORS
In oe-core commit
03c5f39b4d7dd8c81e0a130b7d5884e5af039a24,
it removed obsolete codes about variable MULTILIB_VENDORS.
We clean up the rest obsolete codes related with
MULTILIB_VENDORS
(From OE-Core rev:
43a1c2dc08b4291e042b6c9ef981bd094ea2c477)
Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
