Got rid of python-git since there is no python2 version of the package.
(From OE-Core rev: dd9d95e8394a7a318538c7cabd27c82e4bc9e029)
Signed-off-by: Oleksandr Kravchuk <open.source@oleksandr-kravchuk.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>