Below is a Go example. I also recommend that your check out our gRPC reference: https://buf.build/authzed/api/docs/main:authzed.api.v1#authzed.api.v1.PermissionsService.DeleteRelationships

_, err := client.DeleteRelationships(context.Background(), &v1.DeleteRelationshipsRequest{
        RelationshipFilter: &v1.RelationshipFilter{
            ResourceType:     "exampleobject",
            OptionalSubjectFilter: &v1.SubjectFilter{
                SubjectType: "examplesubject",
            },
        },
    })