cleanup unused incremental resolution

pkg/front_end/lib/src/fasta/scanner/token.dart

Index: pkg/front_end/lib/src/fasta/scanner/token.dart
diff --git a/pkg/front_end/lib/src/fasta/scanner/token.dart b/pkg/front_end/lib/src/fasta/scanner/token.dart
index e32d2c0149236c320951f757103ff98645195d4e..f419056f5cead714a5de7a7174fcd821d231f8b6 100644
--- a/pkg/front_end/lib/src/fasta/scanner/token.dart
+++ b/pkg/front_end/lib/src/fasta/scanner/token.dart
@@ -77,16 +77,6 @@ abstract class Token implements analyzer.TokenWithComment {
   int get end => charEnd;
 
   @override
-  void applyDelta(int delta) {
-    charOffset += delta;
-    CommentToken token = precedingComments;
-    while (token != null) {
-      token.applyDelta(delta);
-      token = token.next;
-    }
-  }
-
-  @override
   analyzer.Token copy() {
     return copyWithoutComments()
       ..precedingComments = copyComments(precedingComments);