Remove josekit #736

Job	Run time
Build aarch64-apple-darwin target	2m 16s
Build x86_64-apple-darwin target	3m 23s
Build x86_64-pc-windows-msvc target	5m 6s
Build x86_64-unknown-linux-gnu target	3m 24s
Build x86_64-unknown-linux-musl target	5m 32s
lint	1m 9s
msrv (ubuntu-latest, stable)	3m 19s
rust-test-vectors	3m 19s
test (ubuntu-latest)	2m 55s
test (macos-latest)	2m 29s
test (windows-latest)	5m 39s
kotlin-acceptance-testing (ubuntu-latest)	55s
kotlin-acceptance-testing (macos-latest)	50s
kotlin-acceptance-testing (macos-12)	1m 18s
kotlin-acceptance-testing (windows-latest)	1m 48s
kotlin-deploy-snapshot	1m 37s
	44m 59s

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