planet: Remove Array(Min,Max) in favor of Min,Max

Since the native functions now accept array parameters, we don't need a
C4Script implementation anymore.

planet/Objects.ocd/Goals.ocd/Parkour.ocd/Script.c

@@ -356,7 +356,7 @@ public func GetPlayerClearedCheckpoints(int plr)
 
 public func GetLeaderClearedCheckpoints()
 {
-	return ArrayMax(plr_list);
+	return Max(plr_list);
 }
 
 private func IsWinner(int plr)

planet/System.ocg/Array.c

@@ -188,27 +188,3 @@ global func RandomElement(array arr)
 {
 	return arr[Random(GetLength(arr))];
 }
-
-// Returns the maximum value in an array.
-global func ArrayMax(array arr)
-{
-	if (GetLength(arr) == 0)
-		return nil;
-	var max = arr[0];
-	for (var elem in arr)
-		if (elem > max)
-			max = elem;
-	return max;
-}
-
-// Returns the minimum value in an array.
-global func ArrayMin(array arr)
-{
-	if (GetLength(arr) == 0)
-		return nil;
-	var min = arr[0];
-	for (var elem in arr)
-		if (elem < min)
-			min = elem;
-	return min;
-}