util: remove unused functions #7460

Job	Run time
Build slim tarball	1m 11s
aarch64-linux: Cache V8 build	31s
aarch64-darwin: with shared libraries	28m 41s
x86_64-linux: with shared libraries	29m 44s
x86_64-darwin: with shared libraries	40m 53s
aarch64-linux: with shared openssl-4.0.0	24m 19s
aarch64-linux: with shared openssl-3.0.20	25m 40s
aarch64-linux: with shared openssl-1.1.1w	24m 41s
aarch64-linux: with shared openssl-3.5.6	24m 55s
aarch64-linux: with shared boringssl-0.20260508.0	24m 4s
aarch64-linux: with shared openssl-3.6.2	24m 18s
	4h 8m 57s

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