docs: remove non-existent production access limit increase form link

Author: thomasgauvin

src/content/docs/email-service/reference/limits.mdx

@@ -24,11 +24,7 @@ Your account starts with conservative limits for sending emails to arbitrary ema
 
 ## Request higher limits
 
-If you need higher limits for production use or have outgrown the default quotas, you can request an increase through our review process.
-
-1. Submit [production access limit increase form](https://forms.cloudflare.com/email-service-limits)
-2. Include use case details and expected volume
-3. Response within 24 hours
+If you need higher limits for production use or have outgrown the default quotas, contact [Cloudflare Support](https://dash.cloudflare.com/support) or your account team to request an increase.
 
 ## Compliance