Remove unused vars #4316

Job	Run time
check-submodules	45s
GraalVM (macos-latest, 22)	4m 5s
check-docs	33s
Android	4m 4s
GraalVM (macos-latest, 21)	4m 6s
GraalVM (macos-latest, 17)	4m 5s
ARM (armv6)	4m 1s
GraalVM (windows-latest, 22)	3m 50s
ARM (armv7)	4m 1s
linux-compat (manylinux2014-x64)	4m 2s
linux-compiler-compat (clang-3)	4m 2s
GraalVM (windows-latest, 21)	3m 51s
linux-compat (manylinux2014-x86)	4m 2s
ARM (arm64)	4m 3s
linux-compiler-compat (clang-6)	4m 1s
GraalVM (windows-latest, 17)	3m 54s
linux-compat (al2-x64)	4m 2s
linux-compiler-compat (clang-8)	4m 1s
GraalVM (ubuntu-latest, 22)	4m 3s
linux-compat (fedora-34-x64)	4m 3s
linux-compiler-compat (clang-9)	4m 1s
GraalVM (ubuntu-latest, 21)	4m 4s
linux-compat (opensuse-leap)	4m 1s
linux-fips-armv8	1m 44s
linux-compiler-compat (clang-10)	4m 2s
GraalVM (ubuntu-latest, 17)	4m 4s
linux-compat (rhel8-x64)	4m 3s
linux-compiler-compat (clang-11)	4m 2s
linux-compiler-compat (gcc-4.8)	3m 59s
linux-fips-x64	4m 1s
linux-compiler-compat (gcc-5)	4m 2s
linux-musl-arm (alpine-3.16-armv7)	3m 59s
linux-musl-x64 (alpine-3.16-x64)	4m 0s
linux-compiler-compat (gcc-6)	4m 0s
linux-musl-arm (alpine-3.16-arm64)	4m 0s
linux-musl-x64 (openwrt-x64-openjdk8)	3m 58s
localhost-test-linux	4m 31s
linux-compiler-compat (gcc-7)	3m 59s
linux-compiler-compat (gcc-8)	4m 0s
localhost-test-macos	4m 22s
localhost-test-win	4m 13s
macos	4m 1s
macos-x64	4m 0s
raspberry (raspbian-bullseye)	3m 58s
windows	3m 47s
windows-vc14 (x86)	3m 48s
windows-vc14 (x64)	3m 49s
	3h 0m 2s

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