Removes unused 'normalized' field in many AST nodes.

compiler/java/com/google/dart/compiler/ast/DartUnaryExpression.java

Index: compiler/java/com/google/dart/compiler/ast/DartUnaryExpression.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartUnaryExpression.java b/compiler/java/com/google/dart/compiler/ast/DartUnaryExpression.java
index 570ed48cb104fd6694c6d873896b0c9616711d05..13e29355606c5850c19e8f2705323ab92930530c 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartUnaryExpression.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartUnaryExpression.java
@@ -15,7 +15,6 @@ public class DartUnaryExpression extends DartExpression implements ElementRefere
   private final Token operator;
   private DartExpression arg;
   private final boolean isPrefix;
-  private DartExpression normalizedNode = this;
   private Element referencedElement;
 
   public DartUnaryExpression(Token operator, DartExpression arg, boolean isPrefix) {
@@ -38,16 +37,6 @@ public class DartUnaryExpression extends DartExpression implements ElementRefere
     return isPrefix;
   }
 
-  public void setNormalizedNode(DartExpression normalizedNode) {
-    normalizedNode.setSourceInfo(this);
-    this.normalizedNode = normalizedNode;
-  }
-
-  @Override
-  public DartExpression getNormalizedNode() {
-    return normalizedNode;
-  }
-
   @Override
   public void traverse(DartVisitor v, DartContext ctx) {
     if (v.visit(this, ctx)) {