diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php
index bc81da184a..4dc0f17fbe 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php
@@ -129,7 +129,6 @@ class WP_REST_Block_Directory_Controller extends WP_REST_Controller {
 			'author_block_count'  => intval( $plugin['author_block_count'] ),
 			'author'              => wp_strip_all_tags( $plugin['author'] ),
 			'icon'                => ( isset( $plugin['icons']['1x'] ) ? $plugin['icons']['1x'] : 'block-default' ),
-			'assets'              => array(),
 			'last_updated'        => gmdate( 'Y-m-d\TH:i:s', strtotime( $plugin['last_updated'] ) ),
 			'humanized_updated'   => sprintf(
 				/* translators: %s: Human-readable time difference. */
@@ -138,21 +137,6 @@ class WP_REST_Block_Directory_Controller extends WP_REST_Controller {
 			),
 		);
 
-		foreach ( $plugin['block_assets'] as $asset ) {
-			// Allow for fully qualified URLs in future
-			if ( 'https' === wp_parse_url( $asset, PHP_URL_SCHEME ) && ! empty( wp_parse_url( $asset, PHP_URL_HOST ) ) ) {
-				$block['assets'][] = esc_url_raw(
-					$asset,
-					array( 'https' )
-				);
-			} else {
-				$block['assets'][] = esc_url_raw(
-					add_query_arg( 'v', strtotime( $block['last_updated'] ), 'https://ps.w.org/' . $plugin['slug'] . $asset ),
-					array( 'https' )
-				);
-			}
-		}
-
 		$this->add_additional_fields_to_object( $block, $request );
 
 		$response = new WP_REST_Response( $block );
@@ -296,16 +280,6 @@ class WP_REST_Block_Directory_Controller extends WP_REST_Controller {
 					'type'        => 'string',
 					'context'     => array( 'view' ),
 				),
-				'assets'              => array(
-					'description' => __( 'An object representing the block CSS and JavaScript assets.' ),
-					'type'        => 'array',
-					'context'     => array( 'view' ),
-					'readonly'    => true,
-					'items'       => array(
-						'type'   => 'string',
-						'format' => 'uri',
-					),
-				),
 			),
 		);
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index bd35983ae9..9820fb78ce 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta4-48655';
+$wp_version = '5.5-beta4-48656';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.