human: remove new() trait

src/population.rs

@@ -345,7 +345,11 @@ mod tests {
         let mut stats: Stats;
 
         for _ in 0..10 {
-            humans.push(Human::new(0, 0));
+            humans.push(Human{
+                present_state: State::Normal,
+                x: 0,
+                y: 0,
+            });
         }
         stats = humans_stats(&humans);
         assert_eq!(stats.normal, 10);