Don't report removed sources as changed in CacheConsistencyValidatorImpl.

pkg/analyzer/lib/src/context/cache.dart

Index: pkg/analyzer/lib/src/context/cache.dart
diff --git a/pkg/analyzer/lib/src/context/cache.dart b/pkg/analyzer/lib/src/context/cache.dart
index 5335a3261cc32271170a01bbef53dc21822cd56e..7b956a96d80e29daf2a21c8669ead285a19b9286 100644
--- a/pkg/analyzer/lib/src/context/cache.dart
+++ b/pkg/analyzer/lib/src/context/cache.dart
@@ -697,10 +697,6 @@ class CacheEntry {
 //      if (deltaResult == null) {
 //        String indent = '  ' * level;
 //        print('[$id]$indent invalidate $descriptor for $target');
-//        if ('$descriptor for $target' ==
-//            'READY_LIBRARY_ELEMENT2 for /Users/scheglov/tmp/limited-invalidation/async/lib/async.dart') {
-//          print('interesting');
-//        }
 //      }
     }
     // Invalidate results that depend on this result.