The ha_partition::table_type() method was just never called before.

sql/ha_partition.cc

@@ -457,13 +457,6 @@ void ha_partition::init_handler_variables()
 }
 
 
-const char *ha_partition::table_type() const
-{
-  // we can do this since we only support a single engine type
-  return m_file[0]->table_type();
-}
-
-
 /*
   Destructor method
 

sql/ha_partition.h

@@ -1071,9 +1071,6 @@ class ha_partition :public handler
   */
   const char *index_type(uint inx) override;
 
-  /* The name of the table type that will be used for display purposes */
-  const char *table_type() const;
-
   /* The name of the row type used for the underlying tables. */
   enum row_type get_row_type() const override;