DO NOT MERGE: remove system_server sdcard_type

klp-modular-dev-plus-aosp has a rule allowing system_server
access to sdcard file descriptors, but this change isn't
in AOSP nor internal master.

This line was removed in https://android-review.googlesource.com/84081 .
Pull the line out from the -plus-aosp tree. DO NOT MERGE because
this change is already in internal master.

Change-Id: I0a1b08f75d309a5a1acb5dc1a44212f9d35eaf3e

system_server.te

@@ -245,9 +245,6 @@ allow system_server cache_backup_file:file { relabelto relabelfrom };
 # LocalTransport creates and relabels /cache/backup
 allow system_server cache_backup_file:dir { relabelto relabelfrom create_dir_perms };
 
-# Access SDcard files passed via binder or sockets.
-allow system_server sdcard_type:file { read write getattr };
-
 # Allow system to talk to usb device
 allow system_server usb_device:chr_file rw_file_perms;
 allow system_server usb_device:dir r_dir_perms;