Removed fixed dependencies

packages/html/lib/src/utils.dart

 /// Misc things that were useful when porting the code from Python.
 library utils;
 
 import 'constants.dart';
 
 typedef bool Predicate();
 
 class Pair<F, S> {
   final F first;
   final S second;
@@ skipping 25 matching lines @@
 bool startsWithAny(String str, List<String> prefixes) {
   for (var prefix in prefixes) {
     if (str.startsWith(prefix)) {
       return true;
     }
   }
   return false;
 }
 
 // Like the python [:] operator.
-List slice(List list, int start, [int end]) {
+List/*<T>*/ slice/*<T>*/(List/*<T>*/ list, int start, [int end]) {
   if (end == null) end = list.length;
   if (end < 0) end += list.length;
 
   // Ensure the indexes are in bounds.
   if (end < start) end = start;
   if (end > list.length) end = list.length;
   return list.sublist(start, end);
 }
 
 bool allWhitespace(String str) {
@@ skipping 57 matching lines @@
 
       last = match + 1;
     }
 
     result.write(format.substring(last, format.length));
     format = result.toString();
   });
 
   return format;
 }