no timeout for volume vacuum

revert changes on volume vacuum timemout from https://github.com/chrislusf/seaweedfs/pull/829

weed/topology/topology_vacuum.go

@@ -51,7 +51,6 @@ func batchVacuumVolumeCompact(vl *VolumeLayout, vid storage.VolumeId, locationli
 	ch := make(chan bool, locationlist.Length())
 	for index, dn := range locationlist.list {
 		go func(index int, url string, vid storage.VolumeId) {
-			//	TODO: set timeout according to actual compact duration
 			glog.V(0).Infoln(index, "Start vacuuming", vid, "on", url)
 			err := operation.WithVolumeServerClient(url, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 				_, err := volumeServerClient.VacuumVolumeCompact(context.Background(), &volume_server_pb.VacuumVolumeCompactRequest{
@@ -85,10 +84,7 @@ func batchVacuumVolumeCommit(vl *VolumeLayout, vid storage.VolumeId, locationlis
 	for _, dn := range locationlist.list {
 		glog.V(0).Infoln("Start Commiting vacuum", vid, "on", dn.Url())
 		err := operation.WithVolumeServerClient(dn.Url(), func(volumeServerClient volume_server_pb.VolumeServerClient) error {
-			ctx, cancel := context.WithTimeout(context.Background(), time.Duration(5*time.Second))
-			defer cancel()
-
-			_, err := volumeServerClient.VacuumVolumeCommit(ctx, &volume_server_pb.VacuumVolumeCommitRequest{
+			_, err := volumeServerClient.VacuumVolumeCommit(context.Background(), &volume_server_pb.VacuumVolumeCommitRequest{
 				VolumdId: uint32(vid),
 			})
 			return err
@@ -109,10 +105,7 @@ func batchVacuumVolumeCleanup(vl *VolumeLayout, vid storage.VolumeId, locationli
 	for _, dn := range locationlist.list {
 		glog.V(0).Infoln("Start cleaning up", vid, "on", dn.Url())
 		err := operation.WithVolumeServerClient(dn.Url(), func(volumeServerClient volume_server_pb.VolumeServerClient) error {
-			ctx, cancel := context.WithTimeout(context.Background(), time.Duration(5*time.Second))
-			defer cancel()
-
-			_, err := volumeServerClient.VacuumVolumeCleanup(ctx, &volume_server_pb.VacuumVolumeCleanupRequest{
+			_, err := volumeServerClient.VacuumVolumeCleanup(context.Background(), &volume_server_pb.VacuumVolumeCleanupRequest{
 				VolumdId: uint32(vid),
 			})
 			return err