Remove the flag for enabling ProvisioningRequests

The API is not stable yet, we don't want people to depend on the
current version.

cluster-autoscaler/main.go

@@ -258,8 +258,9 @@ var (
 			"--max-graceful-termination-sec flag should not be set when this flag is set. Not setting this flag will use unordered evictor by default."+
 			"Priority evictor reuses the concepts of drain logic in kubelet(https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/2712-pod-priority-based-graceful-node-shutdown#migration-from-the-node-graceful-shutdown-feature)."+
 			"Eg. flag usage:  '10000:20,1000:100,0:60'")
-	provisioningRequestsEnabled = flag.Bool("enable-provisioning-requests", false, "Whether the clusterautoscaler will be handling the ProvisioningRequest CRs.")
-	frequentLoopsEnabled        = flag.Bool("frequent-loops-enabled", false, "Whether clusterautoscaler triggers new iterations more frequently when it's needed")
+	// Intentionally disabled for the 1.30 Cluster Autoscaler release, since the ProvisioningRequest API is not stable yet.
+	// provisioningRequestsEnabled = flag.Bool("enable-provisioning-requests", false, "Whether the clusterautoscaler will be handling the ProvisioningRequest CRs.")
+	frequentLoopsEnabled = flag.Bool("frequent-loops-enabled", false, "Whether clusterautoscaler triggers new iterations more frequently when it's needed")
 )
 
 func isFlagPassed(name string) bool {
@@ -432,7 +433,8 @@ func createAutoscalingOptions() config.AutoscalingOptions {
 		},
 		DynamicNodeDeleteDelayAfterTaintEnabled: *dynamicNodeDeleteDelayAfterTaintEnabled,
 		BypassedSchedulers:                      scheduler_util.GetBypassedSchedulersMap(*bypassedSchedulers),
-		ProvisioningRequestEnabled:              *provisioningRequestsEnabled,
+		// Intentionally disabled for the 1.30 Cluster Autoscaler release, since the ProvisioningRequest API is not stable yet.
+		ProvisioningRequestEnabled: false,
 	}
 }