Fix warnings for unused local variables.

js/rhino/src/org/mozilla/javascript/IRFactory.java

@@ -587,7 +587,6 @@ final class IRFactory
         Node assign;
         if (destructuring != -1) {
             assign = createDestructuringAssignment(declType, lvalue, id);
-            int len = assign.getIntProp(Node.DESTRUCTURING_ARRAY_LENGTH, 0);
             if (!isForEach && (destructuring == Token.OBJECTLIT ||
                                destructuringLen != 2))
             {

js/rhino/src/org/mozilla/javascript/NativeIterator.java

@@ -43,9 +43,6 @@ public final class NativeIterator extends IdScriptableObject {
         // Iterator
         NativeIterator iterator = new NativeIterator();
         iterator.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed);
-        
-        // Generator
-        NativeGenerator prototype = NativeGenerator.init(scope, sealed);
 
         // StopIteration
         NativeObject obj = new StopIteration();

js/rhino/xmlimplsrc/org/mozilla/javascript/xmlimpl/XMLLibImpl.java

@@ -325,7 +325,6 @@ public final class XMLLibImpl extends XMLLib implements Serializable {
             }
         }
 
-        Namespace result;
         Object ns = ScriptRuntime.searchDefaultNamespace(cx);
         if (ns == null) {
             return namespacePrototype;
@@ -485,7 +484,6 @@ public final class XMLLibImpl extends XMLLib implements Serializable {
         // This is duplication of constructQName(cx, namespaceValue, nameValue)
         // but for XMLName
 
-        String uri;
         String localName;
 
         if (nameValue instanceof QName) {
@@ -515,7 +513,6 @@ public final class XMLLibImpl extends XMLLib implements Serializable {
     }
 
     XmlNode.QName toNodeQName(Context cx, String name, boolean attribute) {
-        String local = name;
         XmlNode.Namespace defaultNamespace = getDefaultNamespace(cx).getDelegate();
         if (name != null && name.equals("*")) {
             return XmlNode.QName.create(null, null);

js/rhino/xmlimplsrc/org/mozilla/javascript/xmlimpl/XMLName.java

@@ -227,7 +227,6 @@ class XMLName extends Ref {
     }
 
     private void addDescendantAttributes(XMLList list, XML target) {
-        XMLName name = this;
         if (target.isElement()) {
             addMatchingAttributes(list, target);
             XML[] children = target.getChildren();