Context menu:
- Hold on item
- Show context menu with delete command
- Tap delete command to remove item
http://msdn.microsoft.com/library/windows/apps/BR208693
Selection:
- Tap left of item to multi-select items (show checkbox after tapping left)
- Show delete button in application bar when in selection mode
- Tap on delete button to remove items
Alternative: Button in application bar for selection mode / show selection checkboxes
http://msdn.microsoft.com/en-us/library/windowsphone/develop/ff431813(v=vs.105).aspx
What else?