oniro-linux.conf: Drop PACKAGE_EXCLUDE_COMPLEMENTARY workaround for OpenSSH

The fix landed now in upstream[1] so we can drop the local fix introduced
in d67b9745.

[1] https://bugzilla.yoctoproject.org/show_bug.cgi?id=14858



Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>