Plugins: Remove obsolete `plugin_slugs` transient from `WP_Plugins_List_Table::prepare_items()`.

The transient is only used in the `wp_dashboard_plugins_output()` function, which is deprecated and unused since [40607].

The function itself also sets the same transient, so it can be removed from `WP_Plugins_List_Table`.

Props aftabmuni.
Fixes #49340.
Built from https://develop.svn.wordpress.org/trunk@47167


git-svn-id: http://core.svn.wordpress.org/trunk@46967 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-plugins-list-table.php

@@ -159,8 +159,6 @@ class WP_Plugins_List_Table extends WP_List_Table {
 			$show_network_active = apply_filters( 'show_network_active_plugins', $show );
 		}
 
-		set_transient( 'plugin_slugs', array_keys( $plugins['all'] ), DAY_IN_SECONDS );
-
 		if ( $screen->in_admin( 'network' ) ) {
 			$recently_activated = get_site_option( 'recently_activated', array() );
 		} else {

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-47166';
+$wp_version = '5.4-alpha-47167';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.