modules/tm: removed no longer needed ASYNC mutex

modules/tm/h_table.c

@@ -371,7 +371,6 @@ struct cell*  build_cell( struct sip_msg* p_msg )
 
 	init_synonym_id(p_msg, new_cell->md5);
 	init_cell_lock(  new_cell );
-	init_async_lock( new_cell );
 	t_stats_created();
 	return new_cell;
 

modules/tm/lock.h

@@ -60,7 +60,6 @@ void lock_cleanup(void);
 
 int init_cell_lock( struct cell *cell );
 int init_entry_lock( struct s_table* ht, struct entry *entry );
-int init_async_lock( struct cell *cell );
 
 
 int release_cell_lock( struct cell *cell );