priv_app: remove redundant rule.

Same exact rule is in core policy:
https://android.googlesource.com/platform/system/sepolicy/+/master/private/priv_app.te#81

Test: build policy
Change-Id: I867a2123d80917c0bb26c3e9aae7834f8d81bfea
diff --git a/sepolicy/priv_app.te b/sepolicy/priv_app.te
index d5cb82b..63cc3b9 100644
--- a/sepolicy/priv_app.te
+++ b/sepolicy/priv_app.te
@@ -1,7 +1,5 @@
 allowxperm priv_app self:udp_socket ioctl { SIOCGIWESSID };
 
-r_dir_file(priv_app, sysfs_type)
-
 # Clean up logspam
 dontaudit priv_app device:dir read;
 dontaudit priv_app proc_interrupts:file read;