Remove stable/zed job

stable/zed was transitioned to unmaintained status, so we no longer
have to test it.

Change-Id: I872ba9c19bc946455cdf1bd5391ef00fa2b5af02
diff --git a/.zuul.yaml b/.zuul.yaml
index f72f47d..3eb43ac 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -16,12 +16,6 @@
     nodeset: openstack-single-node-jammy
     override-checkout: stable/2023.1
 
-- job:
-    name: heat-functional-zed
-    parent: heat-functional
-    nodeset: openstack-single-node-focal
-    override-checkout: stable/zed
-
 - project:
     queue: heat
     templates:
@@ -34,7 +28,6 @@
         - heat-functional-2024-1
         - heat-functional-2023-2
         - heat-functional-2023-1
-        - heat-functional-zed
     gate:
       jobs:
         - heat-functional