Fix duplicated empy #201

Job	Run time
micro_ros_platformio (teensy41)	4m 40s
micro_ros_platformio (teensy40)	5m 4s
micro_ros_platformio (teensy36)	6m 55s
micro_ros_platformio (teensy35)	5m 4s
micro_ros_platformio (teensy31)	4m 42s
micro_ros_platformio (due)	5m 0s
micro_ros_platformio (zero)	5m 54s
micro_ros_platformio (olimex_e407)	6m 6s
micro_ros_platformio (esp32dev)	6m 8s
micro_ros_platformio (nanorp2040connect)	7m 44s
micro_ros_platformio (portenta_h7_m7)	6m 26s
micro_ros_platformio (teensy41_eth)	5m 1s
micro_ros_platformio (nanorp2040connect_wifi)	6m 47s
micro_ros_platformio (portenta_h7_m7_wifi)	6m 29s
micro_ros_platformio (esp32dev_wifi)	5m 9s
micro_ros_platformio (portenta_h7_m7_humble)	4m 41s
micro_ros_platformio (portenta_h7_m7_jazzy)	8m 9s
micro_ros_platformio (portenta_h7_m7_rolling)	6m 1s
micro_ros_platformio (teensy41_custom)	7m 10s
micro_ros_platformio (pico)	7m 5s
	2h 0m 15s

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