diff --git a/src/limitedmap.h b/src/limitedmap.h
index c330611865..c719c88f99 100644
--- a/src/limitedmap.h
+++ b/src/limitedmap.h
@@ -54,14 +54,6 @@ public:
         if (ret.second)
             prune();
     }
-    void insert_or_update(const value_type& x)
-    {
-        std::pair<iterator, bool> ret = map.insert(x);
-        if (ret.second)
-            prune();
-        else
-            ret.first->second = x.second;
-    }
     void erase(const key_type& k)
     {
         map.erase(k);