Remove q_sinsemilla4_private #191

Job	Run time
Bitrot check	1m 40s
Build target wasm32-unknown-unknown	4m 57s
Test on i686-unknown-linux-gnu	16m 6s
Build target wasm32-wasi	4m 50s
Test on i686-unknown-linux-gnu with beta features	16m 23s
Book tests	4m 23s
Test on i686-unknown-linux-gnu with nightly features	18m 43s
Intra-doc links	4m 35s
Rustfmt	13s
Test on ubuntu-latest	10m 16s
Test on windows-latest	13m 15s
Test on macOS-latest	15m 8s
Test on ubuntu-latest with beta features	10m 27s
Test on windows-latest with beta features	13m 9s
Test on macOS-latest with beta features	16m 26s
Test on ubuntu-latest with nightly features	11m 46s
Test on windows-latest with nightly features	14m 37s
Test on macOS-latest with nightly features	22m 12s
	3h 19m 6s

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