Removing unused rules.

After checking the auditallow logs for the rule being monitored, it's
clear that the rule is not in use and can be removed. All unused rules
should be removed, as they present needless additional attack vectors.

Test: The device boots.
Change-Id: Ie9e060c4d134212e01309a536ac052851e408320

public/radio.te

@@ -19,9 +19,7 @@ allow radio net_data_file:file r_file_perms;
 
 # Property service
 set_prop(radio, radio_prop)
-set_prop(radio, system_radio_prop)
 set_prop(radio, net_radio_prop)
-auditallow radio system_radio_prop:property_service set;
 
 # ctl interface
 set_prop(radio, ctl_rildaemon_prop)