MAGETWO-37672: Responsive Email Foundation

- Updated composer.json to make Magento\Sales no longer dependent on Magento\Email,
  as usage of Magento\Email was removed in 5a19381

Author: Erik Hansen

app/code/Magento/Sales/composer.json

@@ -21,7 +21,6 @@
         "magento/module-reports": "0.74.0-beta13",
         "magento/module-catalog-inventory": "0.74.0-beta13",
         "magento/module-wishlist": "0.74.0-beta13",
-        "magento/module-email": "0.74.0-beta13",
         "magento/module-shipping": "0.74.0-beta13",
         "magento/module-config": "0.74.0-beta13",
         "magento/module-media-storage": "0.74.0-beta13",