pkg/csslib: remove unused vars and fields

lib/src/analyzer.dart

Index: lib/src/analyzer.dart
diff --git a/lib/src/analyzer.dart b/lib/src/analyzer.dart
index 1341bc20548e1726c3ced2eb708cf29fa3c664f6..4fdd833614b68b4fda74d6a89a834b27fd2b5b7d 100644
--- a/lib/src/analyzer.dart
+++ b/lib/src/analyzer.dart
@@ -596,7 +596,6 @@ class CallMixin extends Visitor {
   MixinDefinition transform(List callArgs) {
     // TODO(terry): Handle default arguments and varArgs.
     // Transform mixin with callArgs.
-    var index = 0;
     for (var index = 0; index < _definedArgs.length; index++) {
       var definedArg = _definedArgs[index];
       VarDefinition varDef;
@@ -908,7 +907,6 @@ class AllExtends extends Visitor {
       new Map<String, List<SelectorGroup>>();
 
   SelectorGroup _currSelectorGroup;
-  List _currDecls;
   int _currDeclIndex;
   List<int> _extendsToRemove = [];