Remove references to removed dict_sys->size

Author: dr-m

storage/innobase/include/dict0mem.h

@@ -670,8 +670,7 @@ struct dict_v_col_t{
 	ulint			v_pos;
 
 	/** Virtual index list, and column position in the index,
-	the allocated memory is not from table->heap, nor it is
-	tracked by dict_sys->size */
+	the allocated memory is not from table->heap */
 	dict_v_idx_list*	v_indexes;
 
 };
@@ -1418,15 +1417,7 @@ struct dict_table_t {
 	/** Hash chain node. */
 	hash_node_t				name_hash;
 
-	/** Memory heap. If you allocate from this heap after the table has
-	been created then be sure to account the allocation into
-	dict_sys->size. When closing the table we do something like
-	dict_sys->size -= mem_heap_get_size(table->heap) and if that is going
-	to become negative then we would assert. Something like this should do:
-	old_size = mem_heap_get_size()
-	mem_heap_alloc()
-	new_size = mem_heap_get_size()
-	dict_sys->size += new_size - old_size. */
+	/** Memory heap */
 	mem_heap_t*				heap;
 
 	/** NULL or the directory path specified by DATA DIRECTORY. */