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.


git-svn-id: https://develop.svn.wordpress.org/trunk@56943 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/includes/factory/class-wp-unittest-factory-for-blog.php

@@ -73,8 +73,6 @@ class WP_UnitTest_Factory_For_Blog extends WP_UnitTest_Factory_For_Thing {
 	 *
 	 * @param int   $blog_id ID of the site to update.
 	 * @param array $fields  The fields to update.
-	 *
-	 * @return void
 	 */
 	public function update_object( $blog_id, $fields ) {}
 

tests/phpunit/includes/factory/class-wp-unittest-factory-for-network.php

@@ -65,8 +65,6 @@ class WP_UnitTest_Factory_For_Network extends WP_UnitTest_Factory_For_Thing {
 	 *
 	 * @param int   $network_id ID of the network to update.
 	 * @param array $fields  The fields to update.
-	 *
-	 * @return void
 	 */
 	public function update_object( $network_id, $fields ) {}
 

tests/phpunit/includes/object-cache.php

@@ -820,7 +820,6 @@ function wp_cache_set_option( $option, $value ) {
  * Switches blog prefix, which changes the cache that is accessed.
  *
  * @param int $blog_id Blog to switch to.
- * @return void
  */
 function wp_cache_switch_to_blog( $blog_id ) {
 	global $wp_object_cache;
@@ -832,7 +831,6 @@ function wp_cache_switch_to_blog( $blog_id ) {
  * Sets up Object Cache Global and assigns it.
  *
  * @global WP_Object_Cache $wp_object_cache WordPress Object Cache
- * @return void
  */
 function wp_cache_init() {
 	global $wp_object_cache;
@@ -843,7 +841,6 @@ function wp_cache_init() {
  * Adds a group or set of groups to the list of non-persistent groups.
  *
  * @param string|array $groups A group or an array of groups to add.
- * @return void
  */
 function wp_cache_add_global_groups( $groups ) {
 	global $wp_object_cache;
@@ -854,7 +851,6 @@ function wp_cache_add_global_groups( $groups ) {
  * Adds a group or set of groups to the list of non-Memcached groups.
  *
  * @param string|array $groups A group or an array of groups to add.
- * @return void
  */
 function wp_cache_add_non_persistent_groups( $groups ) {
 	global $wp_object_cache;
@@ -2329,7 +2325,6 @@ class WP_Object_Cache {
 	 * @link http://wordpress.org/extend/plugins/memcached/
 	 *
 	 * @param array $groups Array of groups.
-	 * @return void
 	 */
 	public function add_global_groups( $groups ) {
 		if ( ! is_array( $groups ) ) {
@@ -2349,7 +2344,6 @@ class WP_Object_Cache {
 	 * @link http://wordpress.org/extend/plugins/memcached/
 	 *
 	 * @param array $groups Array of groups.
-	 * @return void
 	 */
 	public function add_non_persistent_groups( $groups ) {
 		if ( ! is_array( $groups ) ) {
@@ -2381,7 +2375,6 @@ class WP_Object_Cache {
 	 * Switches blog prefix, which changes the cache that is accessed.
 	 *
 	 * @param int $blog_id Blog to switch to.
-	 * @return void
 	 */
 	public function switch_to_blog( $blog_id ) {
 		global $table_prefix;

tests/phpunit/tests/admin/includesPost.php

@@ -1144,8 +1144,6 @@ class Tests_Admin_IncludesPost extends WP_UnitTestCase {
 
 	/**
 	 * Test refreshed nonce for metabox loader.
-	 *
-	 * @return void
 	 */
 	public function test_user_get_refreshed_metabox_nonce() {
 

tests/phpunit/tests/block-supports/wpRenderElementsSupport.php

@@ -25,8 +25,6 @@ class Tests_Block_Supports_WpRenderElementsSupport extends WP_UnitTestCase {
 	 * @ticket 59578
 	 *
 	 * @covers ::wp_render_elements_support
-	 *
-	 * @return void
 	 */
 	public function test_leaves_block_content_alone_when_block_type_not_registered() {
 		$block = array(

tests/phpunit/tests/html-api/wpHtmlProcessorBreadcrumbs.php

@@ -300,7 +300,6 @@ class Tests_HtmlApi_WpHtmlProcessorBreadcrumbs extends WP_UnitTestCase {
 	 * @param string $html        HTML string with tags in it, one of which contains the "target" attribute.
 	 * @param array  $breadcrumbs Breadcrumbs of element with "target" attribute set.
 	 * @param int    $ignored_n   Not used in this test but provided in the dataset for other tests.
-	 * @return void
 	 */
 	public function test_reports_correct_breadcrumbs_for_html( $html, $breadcrumbs, $ignored_n ) {
 		$p = WP_HTML_Processor::create_fragment( $html );