Arduino H7 Video + LVGL 9.x: Remove unused buffer #1302

Job	Run time
compile-examples (arduino:mbed:nano33ble, nano33ble)	7m 9s
compile-examples (arduino:mbed:envie_m7, envie_m7)	26m 47s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, envie_m7_core_cm4)	5m 47s
compile-examples (arduino:mbed:nanorp2040connect, nanorp2040connect)	12m 24s
compile-examples (arduino:mbed:nicla_sense, nicla_sense)	12m 22s
compile-examples (arduino:mbed:nicla_vision, nicla_vision)	14m 46s
compile-examples (arduino:mbed:opta, opta)	17m 13s
compile-examples (arduino:mbed:giga, giga)	26m 25s
compile-examples (arduino:mbed:nicla_voice, nicla_voice)	5m 1s
compile-examples (arduino:mbed:edge_control, edge_control)	5m 12s
	2h 13m 6s

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