sim: remove unused AbstractSim::to_static method

crates/coremem/src/sim/mod.rs

@@ -206,8 +206,9 @@ pub trait AbstractSim: Sync {
     fn put_material_index(&mut self, at: Index, m: Self::Material);
     fn step_multiple<S: Stimulus<Self::Real>>(&mut self, num_steps: u32, s: &S);
 
-    /// Take a "snapshot" of the simulation, dropping all material-specific information.
-    fn to_static(&self) -> StaticSim;
+    /// convert to something which is maximally generalizable.
+    /// the result might then be saved to disc for later readback, where having that consistent
+    /// serialization format is more important than perf.
     fn to_generic(&self) -> GenericSim<Self::Real>;
     fn use_diagnostics(&mut self, _diag: SyncDiagnostics) {
         // optional