Revert "audit use of net.dns. property"

This is just causing unnecessary log spam. Remove.

This reverts commit ecb00a109c7dcf4c29c93b2ac64db3585d303f3f.
Test: build
diff --git a/private/untrusted_app_25.te b/private/untrusted_app_25.te
index a35d81b..5bad58f 100644
--- a/private/untrusted_app_25.te
+++ b/private/untrusted_app_25.te
@@ -26,10 +26,9 @@
 net_domain(untrusted_app_25)
 bluetooth_domain(untrusted_app_25)
 
-# b/34115651, b/33308258 - net.dns* properties read
+# b/34115651 - net.dns* properties read
 # This will go away in a future Android release
 get_prop(untrusted_app_25, net_dns_prop)
-auditallow untrusted_app_25 net_dns_prop:file read;
 
 # b/35917228 - /proc/misc access
 # This will go away in a future Android release