ci: remove duplicate release-3.5 merge rules
ci: remove duplicate release-3.5 merge rules

we already have generic rules to merge the PR's
in devel and release branches with `automatic merge`
rules. Removing the duplicate release-3.5 rule.

Signed-off-by: Madhu Rajanna <60fbf37a92c2a0908e31296d18dadbec5a4dae17@gmail.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi