nl_tokens: Remove all listeners on the transport and on self
pl_tokens: function cleanup ( ) { transport$$1 . removeListener ( 'open' , onTransportOpen ) ; transport$$1 . removeListener ( 'error' , onerror ) ; transport$$1 . removeListener ( 'close' , onTransportClose ) ; self . removeListener ( 'close' , onclose ) ; <mask> . removeListener ( 'upgrading' , onupgrade ) ; }