Remove dead code.

sql/sql_base.h:
  Remove an unused parameter.
sql/sql_servers.cc:
  Remove an unused parameter.

sql/sql_base.cc

@@ -1150,13 +1150,12 @@ bool close_cached_tables(THD *thd, TABLE_LIST *tables,
 }
 
 
-/*
+/**
   Close all tables which match specified connection string or
   if specified string is NULL, then any table with a connection string.
 */
 
-bool close_cached_connection_tables(THD *thd, bool if_wait_for_refresh,
-                                    LEX_STRING *connection)
+bool close_cached_connection_tables(THD *thd, LEX_STRING *connection)
 {
   uint idx;
   TABLE_LIST tmp, *tables= NULL;
@@ -1199,15 +1198,6 @@ bool close_cached_connection_tables(THD *thd, bool if_wait_for_refresh,
   if (tables)
     result= close_cached_tables(thd, tables, FALSE, LONG_TIMEOUT);
 
-  if (if_wait_for_refresh)
-  {
-    mysql_mutex_lock(&thd->mysys_var->mutex);
-    thd->mysys_var->current_mutex= 0;
-    thd->mysys_var->current_cond= 0;
-    thd->proc_info=0;
-    mysql_mutex_unlock(&thd->mysys_var->mutex);
-  }
-
   DBUG_RETURN(result);
 }
 

sql/sql_base.h

@@ -229,8 +229,7 @@ void close_performance_schema_table(THD *thd, Open_tables_state *backup);
 
 bool close_cached_tables(THD *thd, TABLE_LIST *tables,
                          bool wait_for_refresh, ulong timeout);
-bool close_cached_connection_tables(THD *thd, bool wait_for_refresh,
-                                    LEX_STRING *connect_string);
+bool close_cached_connection_tables(THD *thd, LEX_STRING *connect_string);
 void close_all_tables_for_name(THD *thd, TABLE_SHARE *share,
                                bool remove_from_locked_tables);
 OPEN_TABLE_LIST *list_open_tables(THD *thd, const char *db, const char *wild);

sql/sql_servers.cc

@@ -628,7 +628,7 @@ int drop_server(THD *thd, LEX_SERVER_OPTIONS *server_options)
   /* close the servers table before we call closed_cached_connection_tables */
   close_mysql_tables(thd);
 
-  if (close_cached_connection_tables(thd, TRUE, &name))
+  if (close_cached_connection_tables(thd, &name))
   {
     push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_UNKNOWN_ERROR, "Server connection in use");
@@ -1057,7 +1057,7 @@ int alter_server(THD *thd, LEX_SERVER_OPTIONS *server_options)
   /* close the servers table before we call closed_cached_connection_tables */
   close_mysql_tables(thd);
 
-  if (close_cached_connection_tables(thd, FALSE, &name))
+  if (close_cached_connection_tables(thd, &name))
   {
     push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
                         ER_UNKNOWN_ERROR, "Server connection in use");