distrodata: cleanup after moving distro_tracking_fields

distrodata: cleanup after moving distro_tracking_fields

Remove some of the older fields that are not in the new list as we
are able to better automagically generate this directly from the
recipe files the extra files will go away.

To use this, one will have to include the appropirate files, such
as maintainers.inc, upstream_status.inc

(From OE-Core rev: f159ea18cf2a3f0c94d7324a2b63a6f0aabf73f2)

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>