update slack app disclaimer in guide

Author: Matanga1-2

docs/guides/all/send-slack-message-to-user.md

@@ -29,10 +29,6 @@ In this guide, we will use the email addresses from Port integrations (such as G
 - Port's [Slack app](/ai-interfaces/slack-app) installed in your workspace.
 - Access to the Slack app bot token (automatically created as a system secret).
 
-:::tip Slack app setup
-If you haven't installed Port's Slack app yet, you'll need to apply for access to Port's AI program by filling out [this form](https://forms.gle/krhMY7c9JM8MyJJf7) first.
-:::
-
 ## Set up the automations
 
 This guide creates two automations that work together: