Function drop_call 

pub fn drop_call(
    writer: &dyn GraphWriter,
    args: &[Value],
) -> Result<Vec<ProcRow>>

apoc.trigger.drop(databaseName, name). Same write-path shape as install_call — the drop rides through the cluster commit so every peer’s storage drops the entry. The yielded removed column is always true in V2 because the actual apply happens on the leader/applier path; the install/drop procedure itself only buffers the command.