General: Remove discouraged `@return void` annotations.

Such `@return void` annotations must not be used in WordPress core's PHP code, except bundled themes, third-party libraries, and PHP compatibility shims.

Props isabel_brison, swissspidy.
Fixes #59619.

Built from https://develop.svn.wordpress.org/trunk@56943


git-svn-id: http://core.svn.wordpress.org/trunk@56454 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/block-template-utils.php

@@ -478,7 +478,6 @@ function _flatten_blocks( &$blocks ) {
  * @access private
  *
  * @param array $block a parsed block.
- * @return void
  */
 function _inject_theme_attribute_in_template_part_block( &$block ) {
 	if (
@@ -496,7 +495,6 @@ function _inject_theme_attribute_in_template_part_block( &$block ) {
  * @access private
  *
  * @param array $block a parsed block.
- * @return void
  */
 function _remove_theme_attribute_from_template_part_block( &$block ) {
 	if (

wp-includes/class-wp-theme.php

@@ -776,8 +776,6 @@ final class WP_Theme implements ArrayAccess {
 	 * Perform reinitialization tasks.
 	 *
 	 * Prevents a callback from being injected during unserialization of an object.
-	 *
-	 * @return void
 	 */
 	public function __wakeup() {
 		if ( $this->parent && ! $this->parent instanceof self ) {

wp-includes/rest-api/endpoints/class-wp-rest-navigation-fallback-controller.php

@@ -40,8 +40,6 @@ class WP_REST_Navigation_Fallback_Controller extends WP_REST_Controller {
 	 * Registers the controllers routes.
 	 *
 	 * @since 6.3.0
-	 *
-	 * @return void
 	 */
 	public function register_routes() {
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-beta4-56942';
+$wp_version = '6.4-beta4-56943';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.