del unused var

src/main.rs

@@ -64,11 +64,11 @@ fn parse_config(conf: String, pool: &mut Vec<robot::Robot>) -> Result<world::Wor
     };
     let x: i32 = match token1.parse::<i32>() {
         Ok(x) => x,
-        Err(err) => return Err("Could not convert token one from the first string to i32"),
+        Err(_) => return Err("Could not convert token one from the first string to i32"),
     };
     let y: i32 = match token2.parse::<i32>() {
         Ok(x) => x,
-        Err(err) => return Err("Could not convert token two from the first string to i32"),
+        Err(_) => return Err("Could not convert token two from the first string to i32"),
     };
     Ok(world::World { x, y })
 }