Revert "Packet.lua: add clone_to_memory"
Revert "Packet.lua: add clone_to_memory"

This reverts commit bb9b3c25d11b45b14ca41073e121a3f8a8d255b4.

See discussion at https://github.com/snabbco/snabb/pull/998#issuecomment-243100324

Igalia/snabb,Igalia/snabbswitch,mixflowtech/logsensor,kbara/snabb,heryii/snabb,dpino/snabbswitch,eugeneia/snabb,wingo/snabb,dpino/snabbswitch,heryii/snabb,snabbco/snabb,wingo/snabb,dpino/snabb,kbara/snabb,wingo/snabbswitch,kbara/snabb,snabbco/snabb,dpino/snabbswitch,alexandergall/snabbswitch,wingo/snabbswitch,eugeneia/snabbswitch,Igalia/snabb,snabbco/snabb,eugeneia/snabb,heryii/snabb,kbara/snabb,eugeneia/snabb,Igalia/snabbswitch,mixflowtech/logsensor,alexandergall/snabbswitch,Igalia/snabb,heryii/snabb,snabbco/snabb,kbara/snabb,dpino/snabb,Igalia/snabb,mixflowtech/logsensor,snabbco/snabb,eugeneia/snabbswitch,mixflowtech/logsensor,eugeneia/snabbswitch,SnabbCo/snabbswitch,dpino/snabb,alexandergall/snabbswitch,eugeneia/snabb,heryii/snabb,Igalia/snabbswitch,Igalia/snabbswitch,heryii/snabb,alexandergall/snabbswitch,SnabbCo/snabbswitch,SnabbCo/snabbswitch,alexandergall/snabbswitch,snabbco/snabb,dpino/snabb,Igalia/snabb,Igalia/snabbswitch,kbara/snabb,eugeneia/snabb,wingo/snabbswitch,dpino/snabb,wingo/snabb,dpino/snabb,Igalia/snabb,SnabbCo/snabbswitch,alexandergall/snabbswitch,snabbco/snabb,mixflowtech/logsensor,eugeneia/snabb,eugeneia/snabbswitch,wingo/snabb,eugeneia/snabb,snabbco/snabb,Igalia/snabb,wingo/snabbswitch,wingo/snabb,dpino/snabb,wingo/snabb,eugeneia/snabb,alexandergall/snabbswitch,alexandergall/snabbswitch,Igalia/snabb,dpino/snabbswitch