slideshow: remove domain_deprecated attribute

No "granted" messages for the removed permissions observed in three
months of log audits.

Bug: 28760354
Change-Id: I7713a9ad9a1604b17119ecad4970e2aa46c15bd0

slideshow.te

 # slideshow seclabel is specified in init.rc since
 # it lives in the rootfs and has no unique file type.
-type slideshow, domain, domain_deprecated;
+type slideshow, domain;
 
 allow slideshow kmsg_device:chr_file rw_file_perms;
 wakelock_use(slideshow)