MAGETWO-54721: Not possible to use Braintree as a payment method when reward points or store credit has been applied to an order

 - Removed useless isSingleUse() method

Author: YevSent

app/code/Magento/Braintree/Model/Ui/ConfigProvider.php

@@ -79,7 +79,6 @@ public function getConfig()
             'payment' => [
                 self::CODE => [
                     'isActive' => $this->config->isActive(),
-                    'isSingleUse' => !$isPayPalActive,
                     'clientToken' => $this->getClientToken(),
                     'ccTypesMapper' => $this->config->getCctypesMapper(),
                     'sdkUrl' => $this->config->getSdkUrl(),

app/code/Magento/Braintree/Test/Unit/Model/Ui/ConfigProviderTest.php

@@ -154,7 +154,6 @@ public function getConfigDataProvider()
                     'payment' => [
                         ConfigProvider::CODE => [
                             'isActive' => true,
-                            'isSingleUse' => false,
                             'clientToken' => self::CLIENT_TOKEN,
                             'ccTypesMapper' => ['visa' => 'VI', 'american-express' => 'AE'],
                             'sdkUrl' => self::SDK_URL,

app/code/Magento/Braintree/view/frontend/web/js/view/payment/method-renderer/cc-form.js

@@ -133,7 +133,7 @@ define(
              * @param {Boolean} isActive
              */
             onActiveChange: function (isActive) {
-                if (!isActive || this.isSingleUse()) {
+                if (!isActive) {
                     return;
                 }
 
@@ -318,14 +318,6 @@ define(
                 });
 
                 return false;
-            },
-
-            /**
-             * Check if Braintree configured without PayPal
-             * @returns {Boolean}
-             */
-            isSingleUse: function () {
-                return window.checkoutConfig.payment[this.getCode()].isSingleUse;
             }
         });
     }