Function remove

framework/framework/router.ts:8–11

(list: T[], item: T)

type WebSocketCallback = (socket: WebSocket, request: IncomingMessage, ctx: KoaContext) => void;
function remove<T>(list: T[], item: T) {
    const index = list.indexOf(item);
    if (index >= 0) list.splice(index, 1);
}

export class WebSocketLayer {
    clients = new Set<WebSocket>();