Apply fixes from StyleCI

Author: ahinkle

src/Api/CartItems.php

@@ -47,6 +47,6 @@ public function removeItem($itemId)
     {
         $this->validateSingleStoreCode();
 
-        return $this->delete('/carts/mine/items/'. $itemId);
+        return $this->delete('/carts/mine/items/'.$itemId);
     }
 }

src/Api/GuestCarts.php

@@ -131,6 +131,6 @@ public function paymentInformation($cartId, $body = [])
      */
     public function removeItem($cartId, $itemId)
     {
-        return $this->delete('/guest-carts/'.$cartId.'/items/'. $itemId);
+        return $this->delete('/guest-carts/'.$cartId.'/items/'.$itemId);
     }
 }