Docs: Add missing return type for `_remove_theme_support()`.

See #49572.
Built from https://develop.svn.wordpress.org/trunk@48091


git-svn-id: http://core.svn.wordpress.org/trunk@47858 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/theme.php

@@ -2844,6 +2844,8 @@ function remove_theme_support( $feature ) {
  * @global Custom_Background   $custom_background
  *
  * @param string $feature
+ *
+ * @return bool Returns true when support is removed, false when the feature was not registered.
  */
 function _remove_theme_support( $feature ) {
 	global $_wp_theme_features;

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48090';
+$wp_version = '5.5-alpha-48091';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.