diff --git a/src/wp-includes/class-wp-block-type.php b/src/wp-includes/class-wp-block-type.php
index 7b5a42bc4e..4758e172ba 100644
--- a/src/wp-includes/class-wp-block-type.php
+++ b/src/wp-includes/class-wp-block-type.php
@@ -276,18 +276,7 @@ class WP_Block_Type {
 	 */
 	public function get_attributes() {
 		return is_array( $this->attributes ) ?
-			array_merge(
-				$this->attributes,
-				array(
-					'layout' => array(
-						'type' => 'string',
-					),
-				)
-			) :
-			array(
-				'layout' => array(
-					'type' => 'string',
-				),
-			);
+			$this->attributes :
+			array();
 	}
 }
diff --git a/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php b/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php
index f15c5b13ff..423d4a4947 100644
--- a/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php
@@ -424,25 +424,6 @@ class REST_Block_Renderer_Controller_Test extends WP_Test_REST_Controller_Testca
 		remove_filter( 'pre_render_block', $pre_render_filter );
 	}
 
-	/**
-	 * Check success response for getting item with layout attribute provided.
-	 *
-	 * @ticket 45098
-	 */
-	public function test_get_item_with_layout() {
-		wp_set_current_user( self::$user_id );
-
-		$attributes = array(
-			'layout' => 'foo',
-		);
-
-		$request = new WP_REST_Request( 'GET', self::$rest_api_route . self::$block_name );
-		$request->set_param( 'context', 'edit' );
-		$request->set_param( 'attributes', $attributes );
-		$response = rest_get_server()->dispatch( $request );
-		$this->assertEquals( 200, $response->get_status() );
-	}
-
 	/**
 	 * Test getting item with post context.
 	 *