Remove avahi ssh on mesh

src/freedombone-image-customise

     mesh_install_scuttlebot
     #install_ferment
 
+    rm $rootdir/etc/avahi/services/ssh.service
+
     chroot "$rootdir" apt-get clean
     chroot "$rootdir" /bin/rm -rf /var/lib/apt/lists/*
     chroot "$rootdir" apt-get clean