remove partition-specific methods from the base handler class

sql/ha_partition.h

@@ -1484,7 +1484,7 @@ class ha_partition :public handler
     return h;
   }
 
-  virtual ha_rows part_records(void *_part_elem)
+  ha_rows part_records(void *_part_elem)
   {
     partition_element *part_elem= reinterpret_cast<partition_element *>(_part_elem);
     DBUG_ASSERT(m_part_info);
@@ -1503,12 +1503,6 @@ class ha_partition :public handler
     return part_recs;
   }
 
-  virtual handler* part_handler(uint32 part_id)
-  {
-    DBUG_ASSERT(part_id < m_tot_parts);
-    return m_file[part_id];
-  }
-
   friend int cmp_key_rowid_part_id(void *ptr, uchar *ref1, uchar *ref2);
   friend int cmp_key_part_id(void *key_p, uchar *ref1, uchar *ref2);
 };

sql/handler.h

@@ -4601,10 +4601,6 @@ class handler :public Sql_alloc
 
   bool native_versioned() const
   { DBUG_ASSERT(ht); return partition_ht()->flags & HTON_NATIVE_SYS_VERSIONING; }
-  virtual ha_rows part_records(void *_part_elem)
-  { DBUG_ASSERT(0); return false; }
-  virtual handler* part_handler(uint32 part_id)
-  { DBUG_ASSERT(0); return NULL; }
   virtual void update_partition(uint	part_id)
   {}
 protected: