PLT-5703 Update license expiry timing and text (#5602)

* Update license expiry timing and text

* Updating error bar (#5632)

webapp/utils/constants.jsx

@@ -885,8 +885,6 @@ export const Constants = {
     BOT_NAME: 'BOT',
     MAX_PREV_MSGS: 100,
     POST_COLLAPSE_TIMEOUT: 1000 * 60 * 5, // five minutes
-    LICENSE_EXPIRY_NOTIFICATION: 1000 * 60 * 60 * 24 * 15, // 15 days
-    LICENSE_GRACE_PERIOD: 1000 * 60 * 60 * 24 * 15, // 15 days
     PERMISSIONS_ALL: 'all',
     PERMISSIONS_CHANNEL_ADMIN: 'channel_admin',
     PERMISSIONS_TEAM_ADMIN: 'team_admin',