[CI][stable-only] Remove fedora based jobs

devstack-platform-fedora-latest and
devstack-platform-fedora-latest-virt-preview jobs (in experimental
queue) are not defined anymore, so zuul drops config error because
of them, thus they have to be removed.

Change-Id: I29e4c3640c6187b2c97596ec09b96c2c6feb74de
Signed-off-by: Elod Illes <[email protected]>

Author: Elod Illes

.zuul.yaml

@@ -715,10 +715,6 @@
             irrelevant-files: *nova-base-irrelevant-files
         - os-vif-ovs:
             irrelevant-files: *nova-base-irrelevant-files
-        - devstack-platform-fedora-latest:
-            irrelevant-files: *nova-base-irrelevant-files
-        - devstack-platform-fedora-latest-virt-preview:
-            irrelevant-files: *nova-base-irrelevant-files
         - devstack-plugin-ceph-compute-local-ephemeral:
             irrelevant-files: *nova-base-irrelevant-files
         - devstack-tobiko-nova: