[YAML] Remove unused list freer

[vivien-apple]

Problem

ListFreer is declared even if it it never used. That's not a big deal but that's distracting...

Change overview

• Add an helper to generate it only if needed

[github-actions]

PR #15415: Size comparison from cbdecce to e7abdf4

Decreases (1 build for linux)

platform	target	config	section	cbdecce	e7abdf4	change	% change
linux	chip-tool-ipv6only	arm64	(read only)	8864028	8822492	-41536	-0.5
			.text	7489236	7447700	-41536	-0.6

Full report (34 builds for cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, p6, qpg, telink)

platform	target	config	section	cbdecce	e7abdf4	change	% change
cyw30739	light	cyw930739m2evb_01	(read/write)	598130	598130	0	0.0
			.app_xip_area	502968	502968	0	0.0
			.bss	77860	77860	0	0.0
			.data	644	644	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	lock	cyw930739m2evb_01	(read/write)	556166	556166	0	0.0
			.app_xip_area	462548	462548	0	0.0
			.bss	76356	76356	0	0.0
			.data	608	608	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	ota-requestor	cyw930739m2evb_01	(read/write)	577402	577402	0	0.0
			.app_xip_area	474360	474360	0	0.0
			.bss	85452	85452	0	0.0
			.data	552	552	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
efr32	lighting-app	BRD4161A	(read only)	915156	915156	0	0.0
			(read/write)	128600	128600	0	0.0
			.bss	126560	126560	0	0.0
			.data	2040	2040	0	0.0
			.text	915148	915148	0	0.0
		BRD4161A+rpc	(read only)	943856	943856	0	0.0
			(read/write)	145520	145520	0	0.0
			.bss	143336	143336	0	0.0
			.data	2180	2180	0	0.0
			.text	943848	943848	0	0.0
	window-app	BRD4161A	(read only)	848976	848976	0	0.0
			(read/write)	126520	126520	0	0.0
			.bss	124608	124608	0	0.0
			.data	1908	1908	0	0.0
			.text	848968	848968	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	950796	950796	0	0.0
			(read/write)	1399506	1399506	0	0.0
			.dram0.bss	66672	66672	0	0.0
			.dram0.data	14164	14164	0	0.0
			.flash.rodata	199768	199768	0	0.0
			.flash.text	950796	950796	0	0.0
			.iram0.text	62056	62056	0	0.0
		m5stack	(read only)	1000827	1000827	0	0.0
			(read/write)	464912	464912	0	0.0
			.dram0.bss	71824	71824	0	0.0
			.dram0.data	34064	34064	0	0.0
			.flash.rodata	226896	226896	0	0.0
			.flash.text	995443	995443	0	0.0
			.iram0.text	123399	123399	0	0.0
k32w	light	k32w061+release	(read/write)	691092	691092	0	0.0
			.bss	77488	77488	0	0.0
			.data	1916	1916	0	0.0
			.text	605888	605888	0	0.0
	lock	k32w061+release	(read/write)	693636	693636	0	0.0
			.bss	77696	77696	0	0.0
			.data	1956	1956	0	0.0
			.text	608184	608184	0	0.0
linux	chip-tool-ipv6only	arm64	(read only)	8864028	8822492	-41536	-0.5
			(read/write)	434705	434705	0	0.0
			.bss	59265	59265	0	0.0
			.data	1216	1216	0	0.0
			.data.rel.ro	319024	319024	0	0.0
			.dynamic	560	560	0	0.0
			.got	51392	51392	0	0.0
			.init	24	24	0	0.0
			.init_array	208	208	0	0.0
			.rodata	456468	456468	0	0.0
			.text	7489236	7447700	-41536	-0.6
	thermostat-no-ble	arm64	(read only)	2159644	2159644	0	0.0
			(read/write)	149841	149841	0	0.0
			.bss	66433	66433	0	0.0
			.data	1032	1032	0	0.0
			.data.rel.ro	75216	75216	0	0.0
			.dynamic	560	560	0	0.0
			.got	4208	4208	0	0.0
			.init	24	24	0	0.0
			.init_array	352	352	0	0.0
			.rodata	132604	132604	0	0.0
			.text	1808352	1808352	0	0.0
mbed	all-clusters-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2439644	2439644	0	0.0
			.bss	194508	194508	0	0.0
			.data	5352	5352	0	0.0
			.text	1402216	1402216	0	0.0
	lighting-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2400828	2400828	0	0.0
			.bss	188608	188608	0	0.0
			.data	5648	5648	0	0.0
			.text	1363400	1363400	0	0.0
	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2336264	2336264	0	0.0
			.bss	187608	187608	0	0.0
			.data	5624	5624	0	0.0
			.text	1298864	1298864	0	0.0
	pigweed-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	1139840	1139840	0	0.0
			.bss	11796	11796	0	0.0
			.data	4368	4368	0	0.0
			.text	103224	103224	0	0.0
	shell	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2327164	2327164	0	0.0
			.bss	186140	186140	0	0.0
			.data	5456	5456	0	0.0
			.text	1289736	1289736	0	0.0
nrfconnect	lighting-app	nrf52840dk_nrf52840	(read/write)	1021787	1021787	0	0.0
			bss	122624	122624	0	0.0
			rodata	120760	120760	0	0.0
			text	699492	699492	0	0.0
		nrf52840dk_nrf52840+rpc	(read/write)	991175	991175	0	0.0
			bss	119812	119812	0	0.0
			rodata	112284	112284	0	0.0
			text	679368	679368	0	0.0
		nrf52840dongle_nrf52840	(read/write)	1036607	1036607	0	0.0
			bss	123844	123844	0	0.0
			rodata	119608	119608	0	0.0
			text	703236	703236	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	928510	928510	0	0.0
			bss	119184	119184	0	0.0
			rodata	114016	114016	0	0.0
			text	614520	614520	0	0.0
	lock-app	nrf52840dk_nrf52840	(read/write)	950651	950651	0	0.0
			bss	120852	120852	0	0.0
			rodata	109600	109600	0	0.0
			text	641588	641588	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	858126	858126	0	0.0
			bss	117444	117444	0	0.0
			rodata	102768	102768	0	0.0
			text	557392	557392	0	0.0
	pigweed-app	nrf52840dk_nrf52840	(read/write)	527567	527567	0	0.0
			bss	53632	53632	0	0.0
			rodata	49948	49948	0	0.0
			text	361016	361016	0	0.0
	pump-app	nrf52840dk_nrf52840	(read/write)	949099	949099	0	0.0
			bss	120572	120572	0	0.0
			rodata	108552	108552	0	0.0
			text	641408	641408	0	0.0
	pump-controller-app	nrf52840dk_nrf52840	(read/write)	945059	945059	0	0.0
			bss	120576	120576	0	0.0
			rodata	108248	108248	0	0.0
			text	637648	637648	0	0.0
	shell	nrf52840dk_nrf52840	(read/write)	811587	811587	0	0.0
			bss	113324	113324	0	0.0
			rodata	79752	79752	0	0.0
			text	540852	540852	0	0.0
p6	all-clusters-app	default	(read/write)	2489568	2489568	0	0.0
			.bss	122400	122400	0	0.0
			.data	2680	2680	0	0.0
			.text	1447832	1447832	0	0.0
	light-app	default	(read/write)	2393560	2393560	0	0.0
			.bss	113648	113648	0	0.0
			.data	2528	2528	0	0.0
			.text	1351824	1351824	0	0.0
	lock-app	default	(read/write)	2357120	2357120	0	0.0
			.bss	113400	113400	0	0.0
			.data	2488	2488	0	0.0
			.text	1315384	1315384	0	0.0
qpg	lighting-app	qpg6105+debug	(read only)	599972	599972	0	0.0
			(read/write)	146936	146936	0	0.0
			.bss	90904	90904	0	0.0
			.data	1116	1116	0	0.0
			.text	594652	594652	0	0.0
	lock-app	qpg6105+debug	(read only)	565732	565732	0	0.0
			(read/write)	146936	146936	0	0.0
			.bss	90912	90912	0	0.0
			.data	1068	1068	0	0.0
			.text	560412	560412	0	0.0
	persistent-storage-app	qpg6105+debug	(read only)	99536	99536	0	0.0
			(read/write)	146941	146941	0	0.0
			.bss	24001	24001	0	0.0
			.data	180	180	0	0.0
			.text	94216	94216	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	880954	880954	0	0.0
			bss	86372	86372	0	0.0
			noinit	37160	37160	0	0.0
			text	622274	622274	0	0.0

[bzbarsky-apple]

Might want the same in some of the Darwin code, as a followup.