netplug: don't test if the binary exists in the init script

The test doesn't make sense. It just exits without any error if the
binary doesn't exist, which is silly.

Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit b77c9d265e)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/netplug/S29netplug

@@ -32,8 +32,6 @@ elif [ ! -f /etc/network/interfaces ]; then
 	exit 0
 fi
 
-[ -x /sbin/netplugd ] || exit 0
-
 if [ -f /etc/sysconfig/netplugd ]; then
     . /etc/sysconfig/netplugd
 fi