Fix CI - unused vars #2270

Job	Run time
address-sanitizer	31m 34s
clang-format-check	18s
mac-os-build-clang	17m 6s
mac-os-build-gcc	19m 1s
mac-os-m1-build-clang	30m 14s
static-build-mac	34m 50s
undefined-behavior-sanitizer	29m 34s
linux-gcc-4_4	18m 6s
mbedtls-mac-os-build-clang	27m 38s
mbedtls-ubuntu-clang	27m 36s
mbedtls-ubuntu-gcc	28m 7s
mbedtls-ubuntu-gcc-11	27m 58s
mbedtls-ubuntu-gcc-4_4-build	2m 19s
mbedtls-ubuntu-gcc-static	2m 24s
sample-check	4m 46s
static-build-linux	16m 39s
thread-sanitizer	28m 41s
arm32-cross-compilation	4m 56s
arm32-cross-compilation-mbedtls	2m 37s
arm32-cross-compilation-mbedtls-static	2m 0s
arm64-cross-compilation	4m 39s
arm64-cross-compilation-mbedtls	3m 3s
arm64-cross-compilation-mbedtls-static	2m 4s
linux-aarch64-cross-compilation	4m 50s
sample-check-no-data-channel	4m 50s
ubuntu-os-build	27m 55s
windows-msvc-openssl	29m 40s
	7h 13m 25s

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