[release-1.16] fix: remove duplicated observedGeneration from jobsinks.sinks.knative.dev (#8423)

fix: remove duplicated observedGeneration from jobsinks.sinks.knative.dev

Co-authored-by: Fabian-K <fabiankajzar@googlemail.com>

Author: knative-prow-robot

config/core/resources/jobsink.yaml

@@ -94,10 +94,6 @@ spec:
                       name:
                         description: The name of the applied EventPolicy
                         type: string
-                observedGeneration:
-                  description: ObservedGeneration is the 'Generation' of the Service that was last processed by the controller.
-                  type: integer
-                  format: int64
                 conditions:
                   description: Conditions the latest available observations of a resource's current state.
                   type: array