Revert "Fix trailing slash for cart item name with recurring price"

This reverts commit da9dcb39e7769f3dfc91a3dde20e0db334a56e6c.
Fix trailing dash for cart item name with recurring price

Since the recurring details for are stored as options on the item, the
edd_get_cart_item_price_name() is called and returns an empty string.
This gives
you a product name with a trailing dash like so: "Product Name -".
Checking if the returned price name has some value prevents this
trailing dash. Fixes [issue #1713 for
EDD](https://github.com/easydigitaldownloads/Easy-Digital-Downloads/issues/1713)