#30255: Fixed The coupon code has been accepted. message remains after a Coupon Code was removed

reverted previous changes and updated requested changes

Author: shikhamis11

app/code/Magento/Sales/Controller/Adminhtml/Order/Create.php

@@ -344,7 +344,9 @@ protected function _processActionData($action = null)
                     $this->messageManager->addSuccessMessage(__('The coupon code has been accepted.'));
                 }
             }
-        }
+        } else if (isset($data['coupon']['code']) && empty($couponCode)) {
+                    $this->messageManager->addSuccessMessage(__('The coupon has been removed.'));
+                }
 
         return $this;
     }

app/code/Magento/Sales/i18n/en_US.csv

@@ -803,3 +803,4 @@ If set YES Email field will be required during Admin order creation for new Cust
 "Could not save the shipment tracking","Could not save the shipment tracking"
 "Please enter a coupon code!","Please enter a coupon code!"
 "Reorder is not available.","Reorder is not available."
+"The coupon code has been removed.","The coupon code has been removed."

app/code/Magento/Sales/view/adminhtml/web/order/create/scripts.js

@@ -1202,10 +1202,7 @@ define([
             for (var i = 0; i < this.loadingAreas.length; i++) {
                 var id = this.loadingAreas[i];
                 if ($(this.getAreaId(id))) {
-                    if ('message' != id && response[id]) {
-                        $(this.getAreaId(id)).update(response[id]);
-                    }
-                    if ('message' == id) {
+                    if ('message' != id || response[id]) {
                         $(this.getAreaId(id)).update(response[id]);
                     }
                     if ($(this.getAreaId(id)).callback) {