Newton EOL: Remove branches

Remove stable/newton branch condition that are now obsolete with newton
EOL.

Change-Id: I2464d4c8ec5113d03dc3172b5880dd647ca00091

zuul.d/zuul-legacy-project-templates.yaml

@@ -135,25 +135,21 @@
       jobs:
         - legacy-tempest-dsvm-designate-pdns4
         - legacy-tempest-dsvm-designate-bind9
-        - legacy-tempest-dsvm-designate-pdns4-postgres:
+        - legacy-tempest-dsvm-designate-pdns4-postgres
-            branches: ^(?!stable/newton).*$
         - legacy-tempest-dsvm-designate-pdns4-worker-model
         - legacy-rally-dsvm-designate-designate-pdns4:
             voting: false
-        - legacy-grenade-dsvm-designate-pdns4:
+        - legacy-grenade-dsvm-designate-pdns4
-            branches: ^(?!stable/newton).*$
         - legacy-tempest-dsvm-designate-pdns4-identity-v3-only
         - legacy-tempest-dsvm-designate-pdns4-py35:
             voting: false
-            branches: ^(?!stable/(newton|ocata)).*$
+            branches: ^(?!stable/ocata).*$
     gate:
       jobs:
         - legacy-tempest-dsvm-designate-pdns4
         - legacy-tempest-dsvm-designate-bind9
-        - legacy-grenade-dsvm-designate-pdns4:
+        - legacy-grenade-dsvm-designate-pdns4
-            branches: ^(?!stable/newton).*$
+        - legacy-tempest-dsvm-designate-pdns4-postgres
-        - legacy-tempest-dsvm-designate-pdns4-postgres:
-            branches: ^(?!stable/newton).*$
         - legacy-tempest-dsvm-designate-pdns4-worker-model
         - legacy-tempest-dsvm-designate-pdns4-identity-v3-only
     experimental: