cleanup unused incremental resolution

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

Index: pkg/front_end/lib/src/scanner/token.dart
diff --git a/pkg/front_end/lib/src/scanner/token.dart b/pkg/front_end/lib/src/scanner/token.dart
index b1be439cb668b22e2b6d2a210236322ecc7acd94..ca3ea2b47d982f0e80fbc336c4c8349fe4cbfb53 100644
--- a/pkg/front_end/lib/src/scanner/token.dart
+++ b/pkg/front_end/lib/src/scanner/token.dart
@@ -85,16 +85,6 @@ class BeginTokenWithComment extends BeginToken implements TokenWithComment {
   }
 
   @override
-  void applyDelta(int delta) {
-    super.applyDelta(delta);
-    Token token = precedingComments;
-    while (token != null) {
-      token.applyDelta(delta);
-      token = token.next;
-    }
-  }
-
-  @override
   Token copy() =>
       new BeginTokenWithComment(type, offset, copyComments(precedingComments));
 }
@@ -490,16 +480,6 @@ class KeywordTokenWithComment extends KeywordToken implements TokenWithComment {
   }
 
   @override
-  void applyDelta(int delta) {
-    super.applyDelta(delta);
-    Token token = precedingComments;
-    while (token != null) {
-      token.applyDelta(delta);
-      token = token.next;
-    }
-  }
-
-  @override
   Token copy() => new KeywordTokenWithComment(
       keyword, offset, copyComments(precedingComments));
 }
@@ -582,11 +562,6 @@ class SimpleToken implements Token {
   String get stringValue => type.stringValue;
 
   @override
-  void applyDelta(int delta) {
-    offset += delta;
-  }
-
-  @override
   Token copy() => new Token(type, offset);
 
   @override
@@ -704,16 +679,6 @@ class StringTokenWithComment extends StringToken implements TokenWithComment {
   }
 
   @override
-  void applyDelta(int delta) {
-    super.applyDelta(delta);
-    Token token = precedingComments;
-    while (token != null) {
-      token.applyDelta(delta);
-      token = token.next;
-    }
-  }
-
-  @override
   Token copy() => new StringTokenWithComment(
       type, lexeme, offset, copyComments(precedingComments));
 }
@@ -896,11 +861,6 @@ abstract class Token implements SyntacticEntity {
   TokenType get type;
 
   /**
-   * Apply (add) the given [delta] to this token's offset.
-   */
-  void applyDelta(int delta);
-
-  /**
    * Return a newly created token that is a copy of this tokens
    * including any [preceedingComment] tokens,
    * but that is not a part of any token stream.