Remove Discord video link from agent-io documentation (#278)

- Removed Discord Destination Setup iframe section (lines 77-86)
- Preserved other video tutorials and page structure
- YouTube video ID 1t22ExfvjSY no longer embedded in docs

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Rick Blalock <rickblalock@mac.com>

Author: devin-ai-integration[bot]

content/Guides/agent-io.mdx

@@ -74,17 +74,6 @@ Required when your agent needs conversations AND notifications, connecting multi
   allowFullScreen
 ></iframe> */}
 
-### Discord Destination Setup
-<iframe 
-  width="100%" 
-  height="400" 
-  src="https://www.youtube.com/embed/1t22ExfvjSY" 
-  title="Introducing Discord destinations" 
-  frameBorder="0" 
-  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
-  allowFullScreen
-></iframe>
-
 ### Email Destination Configuration
 <iframe 
   width="100%" 
@@ -100,4 +89,4 @@ Required when your agent needs conversations AND notifications, connecting multi
 
 - Review the [Agents](/Cloud/agents) documentation for platform-specific configuration
 - Configure *sources* for platforms where users will interact with your agent
-- Set up *destinations* for platforms where your agent will send notifications
+- Set up *destinations* for platforms where your agent will send notifications