Fix Xcode 15.1 build warning #7875

Job	Run time
Check changed files	0s
binary_size_metrics (iOS)	9m 11s
pod-lib-lint-abtesting (iOS)	6m 28s
pod-lib-lint-auth (iOS)	10m 37s
pod-lib-lint-database (iOS)	8m 16s
pod-lib-lint-dynamiclinks (iOS)	7m 40s
pod-lib-lint-firestore (iOS)	41m 16s
pod-lib-lint-functions (iOS)	4m 31s
pod-lib-lint-inappmessaging (iOS)	12m 15s
pod-lib-lint-messaging (iOS)	8m 51s
pod-lib-lint-performance (iOS)	9m 26s
pod-lib-lint-remoteconfig (iOS)	9m 8s
pod-lib-lint-storage (iOS)	8m 4s
create_report	3m 34s
	2h 19m 17s

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