Remove not used mem_root argument from build_clone(), get_copy() and get_item_copy()

TODO:
- Make get_thd_memroot() inline
  - To do this, we need to reduce dependence of include files, especially
    so that sql_class.h is not depending in item.h

1 files changed, 4 insertions, 4 deletions

diff --git a/sql/item_xmlfunc.h b/sql/item_xmlfunc.h
index 3c071b897e2..425b2b8ec1c 100644
--- a/sql/item_xmlfunc.h
+++ b/sql/item_xmlfunc.h
@@ -96,8 +96,8 @@ public:
     Item_xml_str_func(thd, a, b) {}
   const char *func_name() const { return "extractvalue"; }
   String *val_str(String *);
-  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
-  { return get_item_copy<Item_func_xml_extractvalue>(thd, mem_root, this); }
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_func_xml_extractvalue>(thd, this); }
 };
 
 
@@ -112,8 +112,8 @@ public:
     Item_xml_str_func(thd, a, b, c) {}
   const char *func_name() const { return "updatexml"; }
   String *val_str(String *);
-  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
-  { return get_item_copy<Item_func_xml_update>(thd, mem_root, this); }
+  Item *get_copy(THD *thd)
+  { return get_item_copy<Item_func_xml_update>(thd, this); }
 };
 
 #endif /* ITEM_XMLFUNC_INCLUDED */