Driver: simplify the StimuliAdapter

it was basically dead code.

crates/applications/sr_latch/src/main.rs

@@ -143,8 +143,6 @@ fn main() {
     // render a couple CSV files: one very detailed and the other more sparsely detailed
     driver.add_csv_renderer(&*format!("{}meas.csv", prefix), 200, None);
     driver.add_csv_renderer(&*format!("{}meas-sparse.csv", prefix), 1600, None);
-    // how frequently to re-evaluate the stimulus (Sample & Hold interpolation between evaluations)
-    driver.set_steps_per_stim(1000);
 
     driver.step_until(Seconds(duration));
 }