public void removeParseListener(ParseTreeListener listener) {
		if (_parseListeners != null) {
			if (_parseListeners.remove(listener)) {
				if (_parseListeners.isEmpty()) {
					_parseListeners = null;
				}
			}
		}
	}
Remove {@code listener} from the list of parse listeners.

<p>If {@code listener} is {@code null} or has not been added as a parse
listener, this method does nothing.</p>

@see #addParseListener

@param listener the listener to remove
runtime/Java/src/org/antlr/v4/runtime/Parser.java