Remove unmaintained 'users' crate #1633

Job	Run time
Check links	23s
Check links	23s
Cross-compile Parsec to various targets	7m 14s
Cross-compile Parsec to various targets	7m 14s
build-and-export-test-all-docker	0s
build-and-export-test-all-docker	0s
Cargo check all-providers (current Rust stable & old compiler)	16m 14s
Cargo check all-providers (current Rust stable & old compiler)	16m 14s
Various tests targeting a Parsec image with all providers included	31m 7s
Various tests targeting a Parsec image with all providers included	31m 7s
Integration tests using CryptoAuthentication Library provider	11m 48s
Integration tests using CryptoAuthentication Library provider	11m 48s
Check that the fuzz testing framework is still working	14m 33s
Check that the fuzz testing framework is still working	14m 33s
Integration tests using Mbed Crypto provider	13m 38s
Integration tests using Mbed Crypto provider	13m 38s
OnDiskKIM E2E tests on all providers	31m 29s
OnDiskKIM E2E tests on all providers	31m 29s
Integration tests using PKCS 11 provider	16m 56s
Integration tests using PKCS 11 provider	14m 31s
Integration tests using TPM provider	19m 59s
Integration tests using TPM provider	19m 59s
Integration tests using Crypto Trusted Service provider	15m 51s
Integration tests using Crypto Trusted Service provider	15m 51s
	5h 55m 59s

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