Merge pull request #5009 from per1234/remove-ESP8266_Firebase

Remove "ESP8266 Firebase"

Author: MatteoPologruto

registry.txt

@@ -4085,7 +4085,6 @@ https://github.com/ekkai/WizFi360.git|Contributed|WizFi360
 https://github.com/mathertel/RFCodes.git|Contributed|RFCodes
 https://github.com/sparkfun/SparkFun_SCD4x_Arduino_Library.git|Contributed|SparkFun SCD4x Arduino Library
 https://github.com/Silver-Fang/TimersOneForAll.git|Contributed|TimersOneForAll
-https://github.com/Rupakpoddar/ESP8266Firebase.git|Contributed|ESP8266 Firebase
 https://github.com/dmadison/CtrlUtil.git|Contributed|Controller Utilities
 https://github.com/Rupakpoddar/ESP8266Webhook.git|Contributed|ESP8266 Webhook
 https://github.com/wokwi/TinyDebug.git|Contributed|TinyDebug