diff --git a/src/main/java/com/gh/mygreen/xlsmapper/expression/ObjectCache.java b/src/main/java/com/gh/mygreen/xlsmapper/expression/ObjectCache.java
deleted file mode 100644
index d71d8aa4..00000000
--- a/src/main/java/com/gh/mygreen/xlsmapper/expression/ObjectCache.java
+++ /dev/null
@@ -1,62 +0,0 @@
-package com.gh.mygreen.xlsmapper.expression;
-
-import java.lang.ref.SoftReference;
-import java.util.HashMap;
-import java.util.LinkedList;
-import java.util.Map;
-
-
-public class ObjectCache<K, V> {
-    
-    private final Map<K, SoftReference<V>> map = new HashMap<K, SoftReference<V>>();
-    
-    private final LinkedList<V> objectsLastAccessed = new LinkedList<V>();
-    private final int objectsToKeepCount;
-    
-    /**
-     * Creates a new cache keeping all objects.
-     */
-    public ObjectCache() {
-        this.objectsToKeepCount = -1;
-    }
-    
-    /**
-     * @param maxObjectsToKeep the number of cached objects that should stay in memory when GC 
-     * starts removing SoftReferences to free memory 
-     */
-    public ObjectCache(final int maxObjectsToKeep) {
-        this.objectsToKeepCount = maxObjectsToKeep;
-    }
-    
-    public void compact() {
-        for (final Map.Entry<K, SoftReference<V>> entry : map.entrySet()) {
-            final SoftReference<V> ref = entry.getValue();
-            if (ref.get() == null) map.remove(entry.getKey());
-        }
-    }
-    
-    public boolean contains(final K key) {
-        return map.containsKey(key);
-    }
-    
-    public V get(final K key) {
-        final SoftReference<V> softReference = map.get(key);
-        if (softReference != null) {
-            final V value = softReference.get();
-            if (value == null) {
-                map.remove(key);
-            } else if (objectsToKeepCount > 0 && value != objectsLastAccessed.getFirst()) {
-                objectsLastAccessed.remove(value);
-                objectsLastAccessed.addFirst(value);
-                if (objectsLastAccessed.size() > objectsToKeepCount) objectsLastAccessed.removeLast();
-            }
-            return softReference.get();
-        }
-        return null;
-    }
-    
-    public void put(final K key, final V value) {
-        map.remove(key);
-        map.put(key, new SoftReference<V>(value));
-    }
-}