Remove previous JWS validation and structs

With the switch from the old `release` field to the new `certs` and
`release` fields as defined in [RFC 5] and implemented in 0773ad7 and
acb0d22, the previously-defined JSON schemas and data structure are no
longer used. So remove them and their tests.

  [RFC 5]: pgxn/rfcs#5

src/release/mod.rs

@@ -92,32 +92,6 @@ impl ReleasePayload {
     }
 }
 
-/// ReleaseJws represents JSON Web Signature release metadata populated by
-/// PGXN.
-#[derive(Serialize, Deserialize, PartialEq, Debug)]
-pub struct ReleaseJws {
-    headers: Vec<String>,
-    signatures: Vec<String>,
-    payload: ReleasePayload,
-}
-
-impl ReleaseJws {
-    /// Borrows the signature headers.
-    pub fn headers(&self) -> &[String] {
-        self.headers.as_slice()
-    }
-
-    /// Borrows the signatures.
-    pub fn signatures(&self) -> &[String] {
-        self.signatures.as_slice()
-    }
-
-    /// Borrows the release payload.
-    pub fn payload(&self) -> &ReleasePayload {
-        self.payload.borrow()
-    }
-}
-
 /**
 
 Represents metadata for a PGXN release, which is the same as [`Distribution`]

src/release/tests.rs

@@ -5,23 +5,6 @@ use std::{error::Error, fs::File, io::Write, path::PathBuf};
 use tempfile::NamedTempFile;
 use wax::Glob;
 
-fn release_meta() -> Value {
-    json!({"release": {
-      "headers": ["eyJhbGciOiJFUzI1NiJ9"],
-      "signatures": [
-        "DtEhU3ljbEg8L38VWAfUAqOyKAM6-Xx-F4GawxaepmXFCgfTjDxw5djxLa8ISlSApmWQxfKTUJqPP3-Kg6NU1Q"
-      ],
-      "payload": {
-        "user": "theory",
-        "date": "2024-07-20T20:34:34Z",
-        "uri": "dist/semver/0.40.0/semver-0.40.0.zip",
-        "digests": {
-          "sha1": "fe8c013f991b5f537c39fb0c0b04bc955457675a"
-        }
-      }
-    }})
-}
-
 fn certs() -> Value {
     json!({
       "certs": {
@@ -438,25 +421,6 @@ fn release_payload() {
     )
 }
 
-#[test]
-fn release_jws() {
-    let release = release_meta();
-    let json = release.get("release").unwrap();
-    let pay: ReleasePayload = serde_json::from_value(json.get("payload").unwrap().clone()).unwrap();
-    let jws: ReleaseJws = serde_json::from_value(json.clone()).unwrap();
-    assert_eq!(
-        json.get("headers").unwrap().as_array().unwrap(),
-        jws.headers(),
-        "headers"
-    );
-    assert_eq!(
-        json.get("signatures").unwrap().as_array().unwrap(),
-        jws.signatures(),
-        "signatures"
-    );
-    assert_eq!(&pay, jws.payload(), "payload");
-}
-
 #[test]
 fn release() -> Result<(), Box<dyn Error>> {
     let dir: PathBuf = [env!("CARGO_MANIFEST_DIR"), "corpus", "v2"]