contracts/common.md#principled-implementation The listener is removed from the set by identity.
Evidence
contracts/common.md#clear-and-simple-design One set deletion.
Evidence
contracts/common.md#prohibited-implementation-shortcuts It removes only the named listener.
Evidence
contracts/common.md#meaningful-documentation The comment names the counterpart operation.
Evidence Exclude
contracts/portability.md#os-neutral-implementation Converter ordering and listener registration operate on JavaScript class and function identity, not native path or process identity.
Unregisters a listener added with on.