Remove insertRange.

editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart

Index: editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart
diff --git a/editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart b/editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart
index 6ebb6a559ee747368c1bc24590c08414852c9485..f26a400c782486ef34e4327a359f58c585f23c8c 100644
--- a/editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart
+++ b/editor/util/plugins/com.google.dart.java2dart/resources/java_core.dart
@@ -333,12 +333,8 @@ class ListWrapper<E> extends ListBase<E> implements List<E> {
     elements.setRange(start, end, iterable, skipCount);
   }
 
-  void removeRange(int start, int length) {
-    elements.removeRange(start, length);
-  }
-
-  void insertRange(int start, int length, [E fill]) {
-    elements.insertRange(start, length, fill);
+  void removeRange(int start, int end) {
+    elements.removeRange(start, end);
   }
 
   Map<int, E> asMap() {