Docs: Remove bugfix since annotations from WP_Theme_JSON::get_block_n…

…odes().

Removes the `@since` bugfix annotations from `WP_Theme_JSON::get_block_nodes()` docblock. Bugfixes are not annotated in docblocks.

Follow-up to [58856].
See #61704.

git-svn-id: https://develop.svn.wordpress.org/trunk@58864 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-theme-json.php

@@ -2738,8 +2738,6 @@ private static function get_block_nodes( $theme_json, $selectors = array(), $opt
 	 * @since 6.6.0 Setting a min-height of HTML when root styles have a background gradient or image.
 	 *              Updated general global styles specificity to 0-1-0.
 	 *              Fixed custom CSS output in block style variations.
-	 * @since 6.6.1 Avoid applying `:root :where()` wrapper to top-level element-only selectors.
-	 * @since 6.6.2 Avoid applying `:root :where()` wrapper to root selectors.
 	 *
 	 * @param array $block_metadata Metadata about the block to get styles for.
 	 *