weed/server: fix dropped error (#8584)

* weed/server: fix dropped error

* Removed the redundant check.

---------

Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>
Co-authored-by: Chris Lu <chris.lu@gmail.com>

weed/server/master_grpc_server_volume.go

@@ -381,10 +381,6 @@ func (ms *MasterServer) VolumeGrow(ctx context.Context, req *master_pb.VolumeGro
 		return nil, fmt.Errorf("only %d volumes left, not enough for %d", ms.Topo.AvailableSpaceFor(&volumeGrowOption), replicaCount)
 	}
 
-	if !ms.Topo.DataCenterExists(volumeGrowOption.DataCenter) {
-		err = fmt.Errorf("data center %v not found in topology", volumeGrowOption.DataCenter)
-	}
-
 	ms.DoAutomaticVolumeGrow(&volumeGrowRequest)
 
 	return &master_pb.VolumeGrowResponse{}, nil