diff --git a/java/src/org/broadinstitute/sting/gatk/walkers/filters/VariantFiltrationWalker.java b/java/src/org/broadinstitute/sting/gatk/walkers/filters/VariantFiltrationWalker.java
index 0abf8ac96..cf6a3e182 100755
--- a/java/src/org/broadinstitute/sting/gatk/walkers/filters/VariantFiltrationWalker.java
+++ b/java/src/org/broadinstitute/sting/gatk/walkers/filters/VariantFiltrationWalker.java
@@ -72,24 +72,12 @@ public class VariantFiltrationWalker extends RodWalker<Integer, Integer> {
     List<VariantContextUtils.JexlVCMatchExp> filterExps;
     List<VariantContextUtils.JexlVCMatchExp> genotypeFilterExps;
 
-    public static final String CLUSTERED_SNP_FILTER_NAME = "SnpCluster";
 
     private VCFWriter writer = null;
 
+    public static final String CLUSTERED_SNP_FILTER_NAME = "SnpCluster";
     private ClusteredSnps clusteredSNPs = null;
 
-    class FilterExp {
-        String name;
-        String expStr;
-        Expression exp;
-
-        public FilterExp(String name, String str, Expression exp) {
-            this.name = name;
-            this.expStr = str;
-            this.exp = exp;
-        }
-    }
-
     // the structures necessary to initialize and maintain a windowed context
     private FiltrationContextWindow variantContextWindow;
     private static final int windowSize = 10;  // 10 variants on either end of the current one