Remove activated feature that checks tx signature len (#21747)

rpc/src/rpc.rs

@@ -2037,10 +2037,6 @@ fn verify_transaction(
         return Err(RpcCustomError::TransactionPrecompileVerificationFailure(e).into());
     }
 
-    if !transaction.verify_signatures_len() {
-        return Err(RpcCustomError::TransactionSignatureVerificationFailure.into());
-    }
-
     Ok(())
 }