Fix a couple of tests

subxt/examples/blocks_subscribing.rs

@@ -52,7 +52,6 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             println!("      Signed Extensions:");
             if let Some(signed_extensions) = ext.signed_extensions() {
                 for signed_extension in signed_extensions.iter() {
-                    let signed_extension = signed_extension?;
                     let name = signed_extension.name();
                     let value = signed_extension.value()?.to_string();
                     println!("        {name}: {value}");

testing/integration-tests/src/full_client/blocks/mod.rs

@@ -351,12 +351,12 @@ async fn decode_signed_extensions_from_blocks() {
 
     assert_eq!(extensions1.iter().count(), expected_signed_extensions.len());
     for (e, expected_name) in extensions1.iter().zip(expected_signed_extensions.iter()) {
-        assert_eq!(e.unwrap().name(), *expected_name);
+        assert_eq!(e.name(), *expected_name);
     }
 
     assert_eq!(extensions2.iter().count(), expected_signed_extensions.len());
     for (e, expected_name) in extensions2.iter().zip(expected_signed_extensions.iter()) {
-        assert_eq!(e.unwrap().name(), *expected_name);
+        assert_eq!(e.name(), *expected_name);
     }
 
     // check that era decodes: