Remove unused constructor.

runtime/lib/array.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class ListFactory<T> {
 
   factory List.from(Iterable<T> other) {
     GrowableObjectArray<T> list = new GrowableObjectArray<T>();
     for (final e in other) {
       list.add(e);
     }
     return list;
   }
 
-  factory List.fromList(List<T> other, int startIndex, int endIndex) {
-    List list = new List<T>();
-    if (endIndex > other.length) endIndex = other.length;
-    if (startIndex < 0) startIndex = 0;
-    int count = endIndex - startIndex;
-    if (count > 0) {
-      list.length = count;
-      Arrays.copy(other, startIndex, list, 0, count);
-    }
-    return list;
-  }
-
   factory List([int length = null]) {
     if (length === null) {
       return new GrowableObjectArray<T>();
     } else {
       return new ObjectArray<T>(length);
     }
   }
 }
 
 // TODO(srdjan): Use shared array implementation.
@@ skipping 270 matching lines @@
     if (!hasNext()) {
       throw const NoMoreElementsException();
     }
     return _array[_pos++];
   }
 
   final List<T> _array;
   final int _length;  // Cache array length for faster access.
   int _pos;
 }