Removed unused variable #170

Job	Run time
Building tests/esp32-arduino-hon-ethernet.yaml	1m 58s
Building tests/esp32-arduino-hon-wifi.yaml	1m 50s
Building tests/esp32-arduino-smartair2-ethernet.yaml	1m 44s
Building tests/esp32-arduino-smartair2-wifi.yaml	1m 54s
Building tests/esp32-idf-hon-ethernet.yaml	2m 41s
Building tests/esp32-idf-hon-wifi.yaml	2m 49s
Building tests/esp32-idf-smartair2-ethernet.yaml	2m 46s
Building tests/esp32-idf-smartair2-wifi.yaml	2m 48s
Building tests/esp8266-hon-wifi.yaml	1m 44s
Building tests/esp8266-smartair2-wifi.yaml	1m 39s
Building tests/rpipicow-hon-wifi.yaml	1m 44s
Building tests/rpipicow-smartair2-wifi.yaml	1m 38s
Building tests/esp8266-simple-smartair2.yaml	1m 30s
Building tests/esp8266-simple-hon.yaml	1m 29s
Building tests/libretiny-hon.yaml	2m 6s
Building tests/libretiny-smartair2.yaml	1m 51s
	32m 11s

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