Removes unused 'normalized' field in many AST nodes.

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

Index: compiler/java/com/google/dart/compiler/ast/DartParameter.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartParameter.java b/compiler/java/com/google/dart/compiler/ast/DartParameter.java
index 9c82f8c06fbbf04fe02e35c298ec8b24d6464f9c..3e99cad641e2d91899f00c6ae5f73ac2d743c795 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartParameter.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartParameter.java
@@ -20,7 +20,6 @@ public class DartParameter extends DartDeclaration<DartExpression> implements Ha
   private DartTypeNode typeNode;
   private List<DartParameter> functionParameters;
   private DartExpression defaultExpr;
-  private DartParameter normalizedNode = this;
   private final Modifiers modifiers;
 
   public DartParameter(DartExpression name,
@@ -73,16 +72,6 @@ public class DartParameter extends DartDeclaration<DartExpression> implements Ha
     return null;
   }
 
-  public void setNormalizedNode(DartParameter normalizedNode) {
-    normalizedNode.setSourceInfo(this);
-    this.normalizedNode = normalizedNode;
-  }
-
-  @Override
-  public DartParameter getNormalizedNode() {
-    return normalizedNode;
-  }
-
   @Override
   public void setSymbol(Symbol symbol) {
     this.symbol = (VariableElement) symbol;