DEVDOCS-6563 - Remove multi-lang catalyst in progress note (#1186)

<!-- Ticket number or summary of work -->
# [DEVDOCS-6563]


## What changed?
<!-- Provide a bulleted list in the present tense -->
* Multi-lang is now enabled by default in all legacy and new catalyst
storefronts. This PR removed a note that said multi-lang will be
available in future releases.

## Release notes draft
* Multi-lang Catalyst is now available in all legacy and new catalyst
storefronts.

ping @bc-terra 


[DEVDOCS-6563]:
https://bigcommercecloud.atlassian.net/browse/DEVDOCS-6563?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: chris-nowicki

docs/storefront/catalyst/content-management/internationalization/overview.mdx

@@ -2,10 +2,6 @@
 
 You can localize your Catalyst storefront so that it appears in the shopper's preferred culture or language throughout their browsing and checkout experience.
 
-<Callout type="info">
-Internationalization support in Catalyst is a work in progress. Full multilingual support in headless channels, like Catalyst, will be added in future releases.
-</Callout>
-
 ## Use cases
 
 Catalyst supports the following scenarios: