Drop permissive constraint from bridgemgrd policy.

Change-Id: I462a5bf7f612cf086b87afad914500be57190480
diff --git a/sepolicy/bridge.te b/sepolicy/bridge.te
index 1b5c886..09678c8 100644
--- a/sepolicy/bridge.te
+++ b/sepolicy/bridge.te
@@ -5,8 +5,6 @@
 # Started by init
 init_daemon_domain(bridge)
 
-permissive bridge;
-
 # Uevent for usb connection
 allow bridge self:netlink_kobject_uevent_socket { create bind read };