Removed useless use

src/game/main.rs

@@ -1,10 +1,7 @@
 extern crate sfml;
 extern crate rusty;
 
-use std::time::{
-    Instant,
-    Duration,
-};
+use std::time::Instant;
 
 use sfml::window::{
     Event,
@@ -48,7 +45,6 @@ fn main() {
                 _ => (),
             }
 
-
             scene.manage_event(&event);
         }
 
@@ -65,7 +61,6 @@ fn main() {
         // Display and manage the frame rate
         renderer.display();
 
-
         if ! running {
             break;
         }