ENGCOM-4356: Removed unused else block and corrected return types #21405

 - Merge Pull Request #21405 from yogeshsuhagiya/magento2:2.3-develop-PR-yogesh-8
 - Merged commits:
   1. 15ef6d7
   2. 948f83d

Author: magento-engcom-team

app/code/Magento/GiftMessage/Block/Cart/GiftOptions.php

@@ -3,13 +3,16 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+
 namespace Magento\GiftMessage\Block\Cart;
 
 use Magento\Backend\Block\Template\Context;
 use Magento\Framework\Json\Encoder;
 use Magento\GiftMessage\Model\CompositeConfigProvider;
 
 /**
+ * Gift options cart block.
+ *
  * @api
  * @since 100.0.2
  */
@@ -63,6 +66,8 @@ public function __construct(
     }
 
     /**
+     * Retrieve encoded js layout.
+     *
      * @return string
      */
     public function getJsLayout()

app/code/Magento/GiftMessage/Model/Type/Plugin/Onepage.php

@@ -3,8 +3,12 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+
 namespace Magento\GiftMessage\Model\Type\Plugin;
 
+/**
+ * Add gift message to quote plugin.
+ */
 class Onepage
 {
     /**
@@ -30,6 +34,8 @@ public function __construct(
     }
 
     /**
+     * Add gift message ot quote.
+     *
      * @param \Magento\Checkout\Model\Type\Onepage $subject
      * @param array $result
      * @return array