Remove deprecated_addNit.

pkg/front_end/lib/src/fasta/source/stack_listener.dart

Index: pkg/front_end/lib/src/fasta/source/stack_listener.dart
diff --git a/pkg/front_end/lib/src/fasta/source/stack_listener.dart b/pkg/front_end/lib/src/fasta/source/stack_listener.dart
index 892b4699ce695886f118d4a3100d8105bee8a7d0..eef8d924926302e49025c235721f64c1eca4d3c2 100644
--- a/pkg/front_end/lib/src/fasta/source/stack_listener.dart
+++ b/pkg/front_end/lib/src/fasta/source/stack_listener.dart
@@ -272,8 +272,8 @@ abstract class StackListener extends Listener {
     throw deprecated_inputError(uri, token.charOffset, message.message);
   }
 
-  void deprecated_nit(String message, [int charOffset = -1]) {
-    messages.deprecated_nit(uri, charOffset, message);
+  void nit(Message message, int charOffset) {
+    messages.nit(message, charOffset, uri);
   }
 
   void deprecated_warning(String message, [int charOffset = -1]) {