mvebu: cortexa9: drop removal of firewall4 package
Drop removal of firewall4 package for Synology DS213j device.
With OPKG the firewall4 package was installed anyway as it's a
dependency of luci-app-firewall and was silently installed again later
in such condition. Drop it to fix support for APK.
Signed-off-by: Christian Marangi <[email protected]>
Christian Marangi