Remove some (but not all) unused methods in analyzer.

pkg/analyzer/lib/src/error.dart

Index: pkg/analyzer/lib/src/error.dart
diff --git a/pkg/analyzer/lib/src/error.dart b/pkg/analyzer/lib/src/error.dart
index b138e41bd8035531692d357bea9aa3351f8189a5..2b95b69a0995e1bc63b206f8235bcf20aaa61cb7 100644
--- a/pkg/analyzer/lib/src/error.dart
+++ b/pkg/analyzer/lib/src/error.dart
@@ -6,7 +6,6 @@ library error;
 import 'dart:collection';
 
 import 'generated/error.dart';
-import 'generated/source.dart';
 
 /// The maximum line length when printing extracted source code when converting
 /// an [AnalyzerError] to a string.
@@ -94,11 +93,11 @@ class AnalyzerError implements Exception {
 }
 
 // A content receiver that collects all the content into a string.
-class _ContentReceiver implements Source_ContentReceiver {
-  final _buffer = new StringBuffer();
-
-  String get result => _buffer.toString();
-
-  void accept(String contents, _) =>
-    _buffer.write(contents.substring(0, contents.length));
-}
+//class _ContentReceiver implements Source_ContentReceiver {

[Brian Wilkerson, 2014/11/13 16:51:56]

We should be able to safely delete this class (not just comment it out).

[scheglov, 2014/11/13 17:07:10]

Done.

+//  final _buffer = new StringBuffer();
+//
+//  String get result => _buffer.toString();
+//
+//  void accept(String contents, _) =>
+//    _buffer.write(contents.substring(0, contents.length));
+//}