Remove OEM_UNLOCK_PROP usage

 * It was only used for adb host scripts, but after commit
   "Remove sys.oem_unlock_allowed check for Android device"
   in 2016, there is no usage for it. Remove it because this prop
   is now exposed to untrusted apps, which is not desirable.

Change-Id: Ic1c2f4e06b3a07ecf3f724fe5085974c626cb3fc
diff --git a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
index a484441..bed4a73 100644
--- a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
+++ b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
@@ -729,7 +729,6 @@
       {"sys.ims.QMI_DAEMON_STATUS", "u:object_r:qcom_ims_prop:s0"},
       {"sys.listeners.registered", "u:object_r:qseecomtee_prop:s0"},
       {"sys.logbootcomplete", "u:object_r:system_prop:s0"},
-      {"sys.oem_unlock_allowed", "u:object_r:system_prop:s0"},
       {"sys.qcom.devup", "u:object_r:system_prop:s0"},
       {"sys.sysctl.extra_free_kbytes", "u:object_r:system_prop:s0"},
       {"sys.usb.config", "u:object_r:system_radio_prop:s0"},