Remove dead code

VersionedMap.cpp

@@ -499,16 +499,6 @@ struct __attribute__((__visibility__("hidden"))) VersionedMap::Impl {
     return result;
   }
 
-  template <std::memory_order kOrder>
-  uint32_t left(uint32_t node, bool which, int64_t at) {
-    return child<kOrder>(node, false, at);
-  }
-
-  template <std::memory_order kOrder>
-  uint32_t right(uint32_t node, bool which, int64_t at) {
-    return child<kOrder>(node, true, at);
-  }
-
   // Returns the node that results from setting `which` to `child` on `node`
   uint32_t update(uint32_t node, bool which, uint32_t child, int64_t version) {
     assert(node == 0 || node >= kMinAddressable);