Remove unused variables in NativeCrypto.c #2

Job	Run time
Select platforms	1s
alpine-linux-x64	0s
docs / build (debug)	1m 50s
linux-cross-compile / build (aarch64)	4m 10s
linux-x64 / build (debug)	1m 33s
linux-x64-hs-minimal / build (debug)	1m 31s
linux-x64 / build (release)	1m 37s
linux-cross-compile / build (arm)	3m 59s
linux-cross-compile / build (s390x)	3m 57s
linux-x64-hs-nopch / build (debug)	1m 33s
linux-cross-compile / build (ppc64le)	4m 25s
linux-cross-compile / build (riscv64)	1m 50s
linux-x64-hs-optimized / build (debug)	1m 33s
linux-x64-hs-zero / build (debug)	1m 33s
linux-x86-hs / build (debug)	2m 1s
linux-x86-hs / build (release)	1m 50s
macos-aarch64 / build (debug)	1m 39s
windows-aarch64 / build (debug)	3m 34s
macos-aarch64 / build (release)	1m 30s
macos-x64 / build (debug)	2m 20s
windows-aarch64 / build (release)	3m 7s
macos-x64 / build (release)	2m 29s
windows-x64 / build (debug)	3m 7s
windows-x64 / build (release)	3m 24s
linux-x64	0s
macos-aarch64	0s
macos-x64	0s
windows-x64	0s
Remove bundle artifacts	1s
	54m 34s

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