I did not found how to remove unused dependencies in opkg help or in the forum. I had installed some luci-app-xxx and then the space left was too little. I removed most of them but the space increased only about 100kb, now I have 744kb left.  I thought I should not use --force-removal-of-dependent-packages when I removed the packages, because this option maybe removes dependencies even if other packages use them too, was that right?  --autoremove without a package name does nothing, so what's th...