build(deps): drop direct dependency on rustls-pki-types (#1051)

Cargo.lock

@@ -1218,7 +1218,6 @@ dependencies = [
  "rsa",
  "rustls",
  "rustls-native-certs",
- "rustls-pki-types",
  "serde",
  "serde_json",
  "sha2",

Cargo.toml

@@ -50,7 +50,6 @@ percent-encoding = { version = "2.3", optional = true }
 native-tls = { version = "0.2.9", optional = true } # feature
 rustls = { version = "0.23.5", default-features = false, features = ["ring", "logging", "std", "tls12"], optional = true }
 rustls-native-certs = { version = "0.8", optional = true }
-rustls-pki-types = { version = "1.10", optional = true }
 webpki-roots = { version = "0.26", optional = true }
 boring = { version = "4", optional = true }
 
@@ -110,7 +109,7 @@ smtp-transport = ["dep:base64", "dep:nom", "dep:socket2", "dep:url", "dep:percen
 
 pool = ["dep:futures-util"]
 
-rustls-tls = ["dep:webpki-roots", "dep:rustls", "dep:rustls-pki-types"]
+rustls-tls = ["dep:webpki-roots", "dep:rustls"]
 
 boring-tls = ["dep:boring"]
 

src/transport/smtp/client/tls.rs

@@ -586,7 +586,7 @@ impl Certificate {
         #[cfg(feature = "rustls-tls")]
         let rustls_cert = {
             CertificateDer::pem_slice_iter(pem)
-                .collect::<Result<Vec<_>, rustls_pki_types::pem::Error>>()
+                .collect::<Result<Vec<_>, pki_types::pem::Error>>()
                 .map_err(|_| error::tls("invalid certificates"))?
         };