userblocklist: fix restart errors

(cherry picked from commit 778374aba27d81058869dba18b5dd0833893056a)

src/modules/userblocklist/db_userblocklist.c

@@ -91,7 +91,6 @@ int userblocklist_db_init(void) {
 		userblocklist_db_close();
 		return -1;
 	}
-	userblocklist_db_close();
 	return 0;
 }