Remove autocomplete delay (#4819)

webapp/utils/constants.jsx

@@ -865,7 +865,6 @@ export const Constants = {
     MENTION_SPECIAL: 'mention.special',
     DEFAULT_NOTIFICATION_DURATION: 5000,
     STATUS_INTERVAL: 60000,
-    AUTOCOMPLETE_TIMEOUT: 100,
     SEARCH_TIMEOUT_MILLISECONDS: 100
 };