Remove unused SHAMap::fetch

src/ripple/shamap/SHAMap.h

@@ -150,16 +150,6 @@ public:
     bool addGiveItem (std::shared_ptr<SHAMapItem const> const&,
                       bool isTransaction, bool hasMeta);
 
-    /** Fetch an item given its key.
-        This retrieves the item whose key matches.
-        If the item does not exist, an empty pointer is returned.
-        Exceptions:
-            Can throw SHAMapMissingNode
-        @note This can cause NodeStore reads
-    */
-    std::shared_ptr<SHAMapItem const> const&
-        fetch (uint256 const& key) const;
-
     // Save a copy if you need to extend the life
     // of the SHAMapItem beyond this SHAMap
     std::shared_ptr<SHAMapItem const> const& peekItem (uint256 const& id) const;

src/ripple/shamap/impl/SHAMap.cpp

@@ -485,16 +485,6 @@ SHAMap::onlyBelow (SHAMapAbstractNode* node) const
 static std::shared_ptr<
     SHAMapItem const> const nullConstSHAMapItem;
 
-std::shared_ptr<SHAMapItem const> const&
-SHAMap::fetch (uint256 const& key) const
-{
-    SHAMapTreeNode const* const leaf =
-        walkToPointer(key);
-    if (! leaf)
-        return nullConstSHAMapItem;
-    return leaf->peekItem();
-}
-
 SHAMapItem const*
 SHAMap::peekFirstItem(NodeStack& stack) const
 {