[2.0] Simplifying code.

tests/Doctrine/Tests/Models/ECommerce/ECommerceCart.php

@@ -61,9 +61,7 @@ class ECommerceCart
         if ($this->customer !== null) {
             $customer = $this->customer;
             $this->customer = null;
-            if ($customer->getCart() !== null) {
-                $customer->removeCart();
-            }
+            $customer->removeCart();
         }
     }
     

tests/Doctrine/Tests/Models/ECommerce/ECommerceCustomer.php

@@ -68,9 +68,7 @@ class ECommerceCustomer
         if ($this->cart !== null) {
             $cart = $this->cart;
             $this->cart = null;
-            if ($cart->getCustomer() !== null) {
-                $cart->removeCustomer();
-            }
+            $cart->removeCustomer();
         }
     }
 }