removed useless imports

5/main.ml

@@ -1,5 +1,4 @@
 open Printf;;
-open String;;
 open Map;;
 
 let rec list_of_lines in_file =
@@ -11,7 +10,7 @@ let rec list_of_lines in_file =
     []
 
 let rec parse_int_list sep str =
-  let list1 = (List.filter (fun a -> length a != 0) (String.split_on_char sep str)) in
+  let list1 = (List.filter (fun a -> String.length a != 0) (String.split_on_char sep str)) in
   List.map int_of_string list1
 
 (* Ordering map is a map that indexes int and maps it into a set of ints,
@@ -22,7 +21,7 @@ module IntSet = Set.Make(Int)
 let rec parse_ordering lines ordering_map =
   match lines with
   | head :: tail ->
-    if length head > 0 then
+    if String.length head > 0 then
       let elems = parse_int_list '|' head in
       let e1 = List.hd elems in
       let e2 = List.nth elems 1 in