`azure_identity` 0.18.0 docs failed to build

[johnbatty]

The docs for azure_identity failed to build on the 0.18.0 release: https://docs.rs/crate/azure_identity/latest

Failed build:

• https://docs.rs/crate/azure_identity/0.18.0/builds/1052726

Build error:

[INFO] [stderr] error: none of the selected packages contains these features: hmac_openssl, hmac_rust

It is locally reproducable:

$ cargo doc --features "enable_reqwest enable_reqwest_rustls hmac_rust hmac_openssl development client_certificate azureauth_c
li"
error: none of the selected packages contains these features: hmac_openssl, hmac_rust

So the problem line appears to be this:

• https://github.com/Azure/azure-sdk-for-rust/blob/main/sdk/identity/Cargo.toml#L51

Introduced here: https://github.com/Azure/azure-sdk-for-rust/commit/3dd2391041628ed2fe987de923714edd568c7fe8