Remove unneeded logging

src/system/model.rs

@@ -100,20 +100,15 @@ impl<R: Rng, P: Position, S: Storage<P>, W: Walker<P>, Sp: Spawner<P>, St: Stick
         let distance = next_position.abs();
 
         if distance > self.kill_circle {
-            println!("HE");
             self.active_particle = None;
         } else if !self.space.is_occupied(&next_position) {
             if self.sticker.should_stick(&mut self.rng, &self.space, &next_position) {
-                println!("STY");
                 self.deposit(&next_position);
                 self.active_particle = None;
                 return;
             } else {
-                println!("MV");
                 self.active_particle.replace(next_position);
             }
-        } else {
-            println!("Err");
         }
     }