SSZ generic tests for big uints

tests/ef_tests/src/cases/bls_g2_uncompressed.rs

@@ -1,5 +1,6 @@
 use super::*;
 use crate::case_result::compare_result;
+use crate::cases::common::BlsCase;
 use bls::hash_on_g2;
 use serde_derive::Deserialize;
 
@@ -9,18 +10,14 @@ pub struct BlsG2UncompressedInput {
     pub domain: String,
 }
 
+impl BlsCase for BlsG2UncompressedInput {}
+
 #[derive(Debug, Clone, Deserialize)]
 pub struct BlsG2Uncompressed {
     pub input: BlsG2UncompressedInput,
     pub output: Vec<Vec<String>>,
 }
 
-impl YamlDecode for BlsG2Uncompressed {
-    fn yaml_decode(yaml: &str) -> Result<Self, Error> {
-        Ok(serde_yaml::from_str(yaml).unwrap())
-    }
-}
-
 impl Case for BlsG2Uncompressed {
     fn result(&self, _case_index: usize) -> Result<(), Error> {
         // Convert message and domain to required types