Delete delete confusing demo.
Delete delete confusing demo.

- standard demoreeel works on ESP32 now
- https://github.com/FastLED/FastLED/issues/711 says this demo worked
  badly.
- https://github.com/FastLED/FastLED/issues/713 says it's incompatible
  with Wifi.

PaulStoffregen/FastLED,FastLED/FastLED,FastLED/FastLED,FastLED/FastLED,FastLED/FastLED,PaulStoffregen/FastLED,PaulStoffregen/FastLED