Remove note on API keys for replica removal (#4970)

Removed note about API keys and support ticket for replica removal.

Author: jsundai

docs/cloud/migrate/migrate-within-cloud.mdx

@@ -67,11 +67,6 @@ If the Namespace uses Private Connectivity, the steps below need additional DNS
 
 5. Remove the Namespace replica in the region you are migrating from.
 
-:::note
-If using [API keys](/cloud/api-keys) for worker authentication, you must open a [support ticket](/cloud/support#support-ticket) to remove the replica.
-
-:::
-
 <CaptionedImage
     src="/img/cloud/high-availability/migrate/4-remove-replica.png"
     title="Remove the replica for the original region"