One issue that has been bugging some users for a while now is the inability to delete temporary files on their Windows Phone 8 devices. Nokia got around this by building in their Storage Check app and even Huawei is reportedly making an app to do the same.
Now, after reports of the GDR2 (and firmware) update rolling out for unbranded HTC 8X owners today, the ability to delete temporary files is evidently built right into the OS.