Revert "net: fix percpu memory leaks"

This reverts commit 1d6119ba.

After reverting commit 6d7b857d ("net: use lib/percpu_counter API
for fragmentation mem accounting") then here is no need for this
fix-up patch.  As percpu_counter is no longer used, it cannot
memory leak it any-longer.

Fixes: 6d7b857d ("net: use lib/percpu_counter API for fragmentation mem accounting")
Fixes: 1d6119ba

 ("net: fix percpu memory leaks")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>