In iOS 8.4, Apple removed Home Sharing for music, a feature that allows users to stream music from their iTunes Library to other devices on their Wi-Fi network. While Home Sharing for video is still available for users to stream their video content, the service's music streaming component was listed as "not currently available." Apple's Eddy Cue has since taken to Twitter to say that the feature will be re-instated in iOS 9:

Cue did not specify whether the feature would be enabled in the upcoming beta build of iOS 9, which is set to arrive later this week with Apple Music integration.

Source: Twitter (Eddy Cue)