diff --git a/src/runtime/mod.rs b/src/runtime/mod.rs
index 4ff25bc6eefbe4e62f889614e0892c06528cbde5..91b233b0363546af1d305a65d0f98362829e89a4 100644
--- a/src/runtime/mod.rs
+++ b/src/runtime/mod.rs
@@ -625,10 +625,6 @@ impl SpecVal {
         self == Self::FIRING
         // all else treated as SILENT
     }
-    fn nth_domain_element(n: usize) -> Self {
-        let n: u16 = n.try_into().unwrap();
-        SpecVal(n)
-    }
     fn iter_domain() -> impl Iterator<Item = Self> {
         (0..).map(SpecVal)
     }