Merge pull request #4492 from per1234/remove-TTN_M5Stack

Remove "TTN_M5Stack"

Author: MatteoPologruto

registry.txt

@@ -2836,7 +2836,6 @@ https://github.com/khoih-prog/ESP8266_AT_WebServer.git|Contributed|ESP8266_AT_We
 https://github.com/ademuri/twilio-esp32-client.git|Contributed|twilio-esp32-client
 https://github.com/sparkfun/SparkFun_STUSB4500_Arduino_Library.git|Contributed|SparkFun STUSB4500
 https://github.com/rgot-org/TheThingsNetwork_esp32.git|Contributed|TTN_esp32
-https://github.com/rgot-org/TTN_M5Stack.git|Contributed|TTN_M5Stack
 https://github.com/arduino-libraries/Arduino_MKRMEM.git|Contributed|Arduino_MKRMEM
 https://github.com/tobiasschuerg/InfluxDB-Client-for-Arduino.git|Contributed|ESP8266 Influxdb
 https://github.com/mihai-dinculescu/arduino-gravity-soil-moisture-sensor.git|Contributed|Gravity Soil Moisture Sensor