Function off

packages/vite/src/node/server/hmr.ts:1173–1175

(event, listener: () => void)

      outsideEmitter.emit('send', payload)
    },
    off(event, listener: () => void) {
      innerEmitter.off(event, listener)
    },
    on: ((event: string, listener: () => unknown) => {
      innerEmitter.on(event, listener)
    }) as ServerHotChannel['on'],