Fixing a crash in grpc#36415

PiperOrigin-RevId: 793925219

Author: sampajano

src/core/lib/event_engine/cf_engine/cfstream_endpoint.cc

@@ -276,9 +276,6 @@ void CFStreamEndpointImpl::Shutdown() {
   read_event_.SetShutdown(shutdownStatus);
   write_event_.SetShutdown(shutdownStatus);
 
-  CFReadStreamSetClient(cf_read_stream_, 0, nullptr, nullptr);
-  CFWriteStreamSetClient(cf_write_stream_, 0, nullptr, nullptr);
-
   CFReadStreamSetDispatchQueue(cf_read_stream_, nullptr);
   CFWriteStreamSetDispatchQueue(cf_write_stream_, nullptr);