Comment cleanup.

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

Index: pkg/analyzer/lib/src/task/strong/info.dart
diff --git a/pkg/analyzer/lib/src/task/strong/info.dart b/pkg/analyzer/lib/src/task/strong/info.dart
index 0c2e48a58309f2634fbc8918cc8c4e6d389ad315..71bb824a562bd648a3b73552b03ea598fe046511 100644
--- a/pkg/analyzer/lib/src/task/strong/info.dart
+++ b/pkg/analyzer/lib/src/task/strong/info.dart
@@ -203,10 +203,6 @@ class DownCastImplicit extends DownCast {
   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)