[CLEANUP] Unused code

src/day6.rs

@@ -23,11 +23,6 @@ impl Day6 {
         }
     }
 
-    fn calc_dist(time: u64, pressed: u64) -> u64 {
-        if pressed > time { return 0 }
-        return (time - pressed) * pressed
-    }
-
     fn calc_ways_to_beat(time: u64, dist: u64) -> u64 {
 
         // y = (t - x) * x = tx - x^2