ovs-lib.in: Remove unnecessary conntrack flush

We introduced flush-conntrack in force-reload-kmod script by commit
8bea39b ("datapath: Prevent panic") to prevent kernel panic.
It turns out that the kernel panic is actually triggered by the
IPv4 secret timer, and it is fixed by commit
1219059 ("compat: Initialize IPv4 reassembly secret timer").

This commit removes the unnecessary conntrack flush in the script.

Signed-off-by: Yi-Hung Wei <yihung.wei@gmail.com>
CC: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Reviewed-by: Greg Rose <gvrose8192@gmail.com>

utilities/ovs-lib.in

@@ -608,9 +608,6 @@ force_reload_kmod () {
     stop_ovsdb
     start_ovsdb || return 1
 
-    if [ -n "$(ovs-dpctl show)" ]; then
-        action "Flush old conntrack entries" ovs-appctl dpctl/flush-conntrack
-    fi
     stop_forwarding
 
     if action "Saving interface configuration" save_interfaces; then