Change define back to NETFX_CORE
Change define back to NETFX_CORE

Since WP8.1 will be using the same WinIntegration as Win8.1.

MarkerMetro/MarkerMetro.Unity.WinIntegration,hungweng/MarkerMetro.Unity.WinIntegration,cedw032/MarkerMetro.Unity.WinIntegration