build-seed: remove yv2 and tiogapass

Meta is no longer actively developing the Yv2 or Tiogapass systems and
is likely to deprecate them.  Remove them from the build-seed since they
have been dropped from Jenkins as well.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ia96b14e4548547a421b2b237d0e9cd55a29af4a6
1 file changed