Removed unused hash calculation

The other method remains for the `ath` claims

Signed-off-by: David Kowis <[email protected]>

Author: dkowis

oauth2/oauth2-resource-server/src/test/java/org/springframework/security/oauth2/server/resource/authentication/DPoPAuthenticationProviderTests.java

@@ -322,11 +322,4 @@ private static String computeSHA256(String value) throws Exception {
 		byte[] digest = md.digest(value.getBytes(StandardCharsets.UTF_8));
 		return Base64.getUrlEncoder().withoutPadding().encodeToString(digest);
 	}
-
-	private static String computeSHA256(PublicKey publicKey) throws Exception {
-		MessageDigest md = MessageDigest.getInstance("SHA-256");
-		byte[] digest = md.digest(publicKey.getEncoded());
-		return Base64.getUrlEncoder().withoutPadding().encodeToString(digest);
-	}
-
 }