zuul: Remove nova-live-migration from check queue

As documented in the associated TODO this job can be removed now that it
has been migrated to zuulv3 by Ib342e2d3c395830b4667a60de7e492d3b9de2f0a.

Change-Id: Id7c0fd8eec09386cd638956a46c1f75844194b9d
diff --git a/.zuul.yaml b/.zuul.yaml
index e71ac8d..c140671 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -737,15 +737,6 @@
             irrelevant-files:
               - ^.*\.rst$
               - ^doc/.*$
-        # NOTE(gmann): Remove this job from devstack pipeline once it is
-        # migrated to zuulv3 native. This is legacy job and rely on
-        # devstack-gate + devstack setting so any change in devstack can
-        # break it.
-        - nova-live-migration:
-            voting: false
-            irrelevant-files:
-              - ^.*\.rst$
-              - ^doc/.*$
     gate:
       jobs:
         - devstack