Remove syncthing tunable_policy.

kernel_read_network_state already give syncthing to get route information. Backup plan with ifconfig does not required.

policy/modules/apps/syncthing.te

@@ -5,14 +5,6 @@ policy_module(syncthing, 1.1.0)
 # Declarations
 #
 
-## <desc>
-##      <p>
-##      Determine whether syncthing can
-##      run ifconfig/iproute2 to find gateway.
-## </p>
-## </desc>
-gen_tunable(syncthing_can_run_ifconfig, false)
-
 attribute_role syncthing_roles;
 role syncthing_roles types syncthing_t;
 
@@ -78,6 +70,3 @@ optional_policy(`
 	networkmanager_read_pid_files(syncthing_t)
 ')
 
-tunable_policy(`syncthing_can_run_ifconfig',`
-        sysnet_domtrans_ifconfig(syncthing_t)
-')