Revert "sysctl: activate conntrack accounting."

This reverts commit 94ca39b479.
Cannot set this because nf_conntrack is not loaded yet.

config/etc/sysctl.conf

@@ -20,8 +20,6 @@ net.ipv4.conf.all.accept_redirects = 0
 net.ipv4.conf.all.accept_source_route = 0
 net.ipv4.conf.all.log_martians = 1
 
-net.netfilter.nf_conntrack_acct = 1
-
 kernel.printk = 1 4 1 7
 vm.swappiness=0
 vm.mmap_min_addr = 4096