Remove legacy jobs in tap-as-a-service

Depends-On: I5615d5b86fe51eba79536183cd8244475c84cc15
Needed-By: Ie1e6567ef404b731ca2e0168bf68eb9cb5ce458b

Change-Id: Id7bbd12a3250849c11860221524e650917247cec

zuul.d/projects.yaml

@@ -15959,28 +15959,10 @@
       - openstack-python35-jobs-neutron
     check:
       jobs:
-        - legacy-tempest-dsvm-tap-as-a-service:
-            irrelevant-files:
-              - ^(test-|)requirements.txt$
-              - ^.*\.rst$
-              - ^doc/.*$
-              - ^neutron_taas/tests/unit/.*$
-              - ^setup.cfg$
-              - ^specs/.*$
         - openstack-tox-cover:
             voting: false
             required-projects:
               - openstack/neutron
-    gate:
-      jobs:
-        - legacy-tempest-dsvm-tap-as-a-service:
-            irrelevant-files:
-              - ^(test-|)requirements.txt$
-              - ^.*\.rst$
-              - ^doc/.*$
-              - ^neutron_taas/tests/unit/.*$
-              - ^setup.cfg$
-              - ^specs/.*$
 
 - project:
     name: openstack/tap-as-a-service-dashboard