[CI] Drop Arduino Leonardo

.github/workflows/main.yml

@@ -50,8 +50,6 @@ jobs:
             run: echo "skip-pattern=(STM32WL|SSTV|LoRaWAN)" >> $GITHUB_OUTPUT
           - id: arduino:avr:mega
             run: echo "options=':cpu=atmega2560'" >> $GITHUB_OUTPUT
-          - id: arduino:avr:leonardo
-            run: echo "skip-pattern=(STM32WL|SSTV|Pager)" >> $GITHUB_OUTPUT
           - id: arduino:mbed:nano33ble
           - id: arduino:mbed:envie_m4
           - id: arduino:megaavr:uno2018