Docs: Remove duplicated content from WordPress 6.6.1 section in v20 u…

…pgrade guide

other-docs/guides/upgrading/v20.md

@@ -72,17 +72,6 @@ standards have been made.
 See the
 [WordPress 6.6 Field Guide](https://make.wordpress.org/core/2024/06/25/wordpress-6-6-field-guide/) for more information.
 
-WordPress 6.6 brings lots of new features, bug fixes, and improvements across the board. In particular, there are improvements
-in performance and accessibility, and new features and updates for the block editor (Gutenberg) and the block API.
-There have been theming improvements of interest to theme developers and designers.
-For developers, the Options API has been improved again, allowing more flexibility in fine-tuning your application performance.
-WordPress 6.6 also drops support for PHP7.0 and 7.1 but given Altis doesn't support PHP 7 at all, this will not affect your
-Altis sites. A number of new filter and action hooks have been added and improvements to modernise the code and apply coding
-standards have been made.
-
-See the
-[WordPress 6.6 Field Guide](https://make.wordpress.org/core/2024/06/25/wordpress-6-6-field-guide/) for more information.
-
 ### Altis Core improvements
 
 Altis dev tools now come with `wp-browser` 4 and `Codeception` 5. This brings full support for PHP 8+. As well as improvements to