Remove empty Sequence in DELETE plan

The following statement generates an empty Sequence that should be removed:

explain delete from `beer-sample` limit 5;

{
"requestID": "ee4f83b9-1c73-4582-80a1-4180ac2ffc1f",
"signature": "json",
"results": [
{
"plan": {
"#operator": "Sequence",
"~children": [
{
"#operator": "IndexScan",
"covers": [
"cover ((meta(`beer-sample`).`id`))"
],
"index": "#primary",
"index_id": "ba960459e5f2ed75",
"keyspace": "beer-sample",
"limit": "5",
"namespace": "default",
"spans": [
{
"Range":

{ "Inclusion": 0, "Low": [ "null" ] }

}
],
"using": "gsi"
},
{
"#operator": "Sequence",
"~children": [
{
"#operator": "Parallel",
"~child":

{ "#operator": "Sequence", "~children": [] }

},

{ "#operator": "Limit", "expr": "5" }

,
{
"#operator": "Parallel",
"~child": {
"#operator": "Sequence",
"~children": [

{ "#operator": "SendDelete", "alias": "beer-sample", "keyspace": "beer-sample", "limit": "5", "namespace": "default" }

]
}
}
]
},

{ "#operator": "Discard" }

]
},
"text": "delete from `beer-sample` limit 5"
}
],
"status": "success",
"metrics":

{ "elapsedTime": "1.157163ms", "executionTime": "1.124308ms", "resultCount": 1, "resultSize": 2557 }

}