Reverting 9094

utils/pub/utils.dart

Index: utils/pub/utils.dart
diff --git a/utils/pub/utils.dart b/utils/pub/utils.dart
index 4eb840a7a1777121c63ecbe8c475f6d0b2789279..f0065faa72aa6a82ccc4964da65e318b65515c1b 100644
--- a/utils/pub/utils.dart
+++ b/utils/pub/utils.dart
@@ -16,16 +16,6 @@ class FormatException implements Exception {
   String toString() => message;
 }
 
-/** A pair of values. */
-class Pair<E, F> {
-  E first;
-  F last;
-
-  Pair(this.first, this.last);
-
-  String toString() => '($first, $last)';
-}
-
 // TODO(rnystrom): Move into String?
 /** Pads [source] to [length] by adding spaces at the end. */
 String padRight(String source, int length) {
@@ -80,18 +70,3 @@ only(Iterable iter) {
   assert(!iterator.hasNext());
   return obj;
 }
-
-/**
- * Replace each instance of [matcher] in [source] with the return value of [fn].
- */
-String replace(String source, Pattern matcher, String fn(Match)) {
-  var buffer = new StringBuffer();
-  var start = 0;
-  for (var match in matcher.allMatches(source)) {
-    buffer.add(source.substring(start, match.start()));
-    start = match.end();
-    buffer.add(fn(match));
-  }
-  buffer.add(source.substring(start));
-  return buffer.toString();
-}