Editor: Partial revert of r55230.

[55230] introduced a regression to the content markup. This changeset is a partial revert to remove the added `wp-includes/block-supports/anchor.php` file. 

The change of adding `'id'` to `$attributes_to_merge` in `get_block_wrapper_attributes()` is not reverted as this change did not impact the regression and helps to support continue development in Gutenberg for the anchor support in dynamic blocks feature.

Reference:
* [WordPress/gutenberg#48592 Gutenberg PR 48592].

Follow-up [55230].

Props wildworks, mamaduka, hellofromTonya. 
Fixes #57830.
See #56852.
Built from https://develop.svn.wordpress.org/trunk@55443


git-svn-id: http://core.svn.wordpress.org/trunk@54976 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-beta3-55442';
+$wp_version = '6.2-beta3-55443';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-settings.php

@@ -327,7 +327,6 @@
 require ABSPATH . WPINC . '/class-wp-block-supports.php';
 require ABSPATH . WPINC . '/block-supports/utils.php';
 require ABSPATH . WPINC . '/block-supports/align.php';
-require ABSPATH . WPINC . '/block-supports/anchor.php';
 require ABSPATH . WPINC . '/block-supports/border.php';
 require ABSPATH . WPINC . '/block-supports/colors.php';
 require ABSPATH . WPINC . '/block-supports/custom-classname.php';