selftests: mirror_gre_lag_lacp: Drop unnecessary code

The selftest does not use functions from mirror_gre_lib, ditch the import.

It does not use arping either, so drop the require_command as well.

Signed-off-by: Petr Machata <[e-mail]>
Reviewed-by: Danielle Ratson <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

tools/testing/selftests/net/forwarding/mirror_gre_lag_lacp.sh

···
 NUM_NETIFS=6
 source lib.sh
 source mirror_lib.sh
-source mirror_gre_lib.sh
-
-require_command $ARPING
 
 vlan_host_create()
 {