Deleting a label will remove it from all places with ION. See below for steps on how to delete it via the API (not available in the UI yet).
{
labels(filters: {value: {eq: <your label here>}}) {
edges {
node {
id
_etag
value
}
}
}
}
mutation DeleteLabel($id: ID!, $etag: String!) {
deleteLabel(id: $id, etag: $etag) {
id
}
}
{
"id": <id from previous step>,
"etag": <etag from previous step>
}