mxnetctl: Remove "upgrade" command

Remove upgrade function, because we'll never need it again.

mxnetctl/mxnetctl

@@ -17,7 +17,6 @@ sub USAGE {
 usage: $0
   start   [options]
   stop    [options] # (ignored)
-  upgrade           # switch from eth to net
 
 options:
   --quiet      : do not log actions
@@ -193,40 +192,6 @@ sub start {
 	}
 }
 
-
-
-sub upgrade {
-	umask 022;
-
-	-d '/etc/local' or mkdir '/etc/local' or die "/etc/local: $!\n";
-
-	read_mxnet();
-	for my $dev (grep /^(eth|net)(\d+)/,network_hardware_devices()) {
-		my $hw=get_hw_address($dev);
-		my $new_dev=preferred_device_name($dev,$hw);
-	}
-	write_mxnet();
-
-	unlink "/etc/udev/rules.d/70-persistent-net.rules";
-
-	my $data=slurpfile('/etc/systemd/system/network.service');
-	unless ($data=~/mxnetctl/) {	
-		$data=~s#^ExecStart#ExecStart=/usr/sbin/mxnetctl start\nExecStart#m;
-		$data=~s/eth(\d+)/sprintf 'net%02d',$1/eg;
-		open my $out,'>','/etc/systemd/system/network.service' or die "/etc/systemd/system/network.service: $!\n";
-		print $out $data;
-		close $out;
-	}
-
-	warn "updated /etc/local/mxnet , /etc/systemd/system/network.service , /etc/udev/rules.d/70-persistent-net.rules - reboot to activate\n";
-}
-
-
-
-
-
-
-
 GetOptions(OPTIONS) or die USAGE;
 
 @ARGV>=1 or die USAGE;
@@ -238,9 +203,6 @@ if ($cmd eq 'start') {
 	start();
 } elsif ($cmd eq 'stop') {
 	;
-} elsif ($cmd eq 'upgrade') {
-	upgrade();
-	;
 } else {
 	die USAGE;
 }