Delete a pod from the eviction requests cache when new pod update dos…

…t not have the annotation

Just in case the annotation got removed but the pod stayed in the cache

pkg/descheduler/evictions/evictions.go

@@ -300,6 +300,13 @@ func NewPodEvictor(
 					}
 					// Ignore pod's that are not subject to an eviction in background
 					if _, exists := newPod.Annotations[EvictionRequestAnnotationKey]; !exists {
+						if has, err := erCache.hasPod(newPod); err == nil && has {
+							klog.V(3).InfoS("Pod with eviction in background lost annotation. Removing pod from the cache.", "pod", klog.KObj(newPod))
+						}
+						if err := erCache.deletePod(newPod); err != nil {
+							// If the deletion fails the cache may block eviction
+							klog.ErrorS(err, "Unable to delete updated pod from cache", "pod", newPod)
+						}
 						return
 					}
 					// Remove completed/suceeeded or failed pods from the cache
@@ -374,8 +381,6 @@ func NewPodEvictor(
 		go erCache.run(ctx)
 
 		podEvictor.erCache = erCache
-	} else {
-		podEvictor.erCache = newEvictionRequestsCache(assumedEvictionRequestTimeoutSeconds)
 	}
 
 	return podEvictor, nil