Comment cleanup.

pkg/analyzer/lib/src/task/strong/info.dart

 // Copyright (c) 2015, 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.
 
 /// Defines static information collected by the type checker and used later by
 /// emitters to generate code.
 // TODO(jmesserly): this was ported from package:dev_compiler, and needs to be
 // refactored to fit into analyzer.
 library analyzer.src.task.strong.info;
 
@@ skipping 185 matching lines @@
 class DownCastImplicit extends DownCast {
   DownCastImplicit(TypeRules rules, Expression expression, Cast cast)
       : super._internal(rules, expression, cast);
 
   @override
   String get name => 'STRONG_MODE_DOWN_CAST_IMPLICIT';
 
   toErrorCode() => new HintCode(name, message);
 }
 
-//
-// Standard down casts.  These casts are implicitly injected by the compiler.
-//
-
 // A down cast from dynamic to T.
 class DynamicCast extends DownCast {
   DynamicCast(TypeRules rules, Expression expression, Cast cast)
       : super._internal(rules, expression, cast);
 
   @override
   String get name => 'STRONG_MODE_DYNAMIC_CAST';
 
   toErrorCode() => new HintCode(name, message);
 }
@@ skipping 317 matching lines @@
 // TODO(vsm,leafp): Remove this.
 class UninferredClosure extends DownCast {
   UninferredClosure(TypeRules rules, FunctionExpression expression, Cast cast)
       : super._internal(rules, expression, cast);
 
   @override
   String get name => 'STRONG_MODE_UNINFERRED_CLOSURE';
 
   toErrorCode() => new StaticTypeWarningCode(name, message);
 }