Update repositories.txt

The two libraries were removed intentionally. 

Due to IFTTT moving the Webhook applet to their Pro version, which significantly reduces the user base and makes testing and updates challenging, these libraries are no longer maintained.

Author: Rupakpoddar

repositories.txt

@@ -5415,8 +5415,6 @@ https://github.com/ruiseixasm/Robust-EEPROM
 https://github.com/ruiseixasm/Versatile_RotaryEncoder
 https://github.com/ruminize/FlashLightLED
 https://github.com/Rupakpoddar/FirebaseArduino
-https://github.com/Rupakpoddar/ESP32Webhook
-https://github.com/Rupakpoddar/ESP8266Webhook
 https://github.com/rv701/SPL06-007
 https://github.com/RyoKosaka/HelloDrum-arduino-Library
 https://github.com/ryraki/FXLS89xx_Arduino