Remove i386 architecture

[defrag mentation]

Wine 11.0 has enabled 'new wow64 mode' by default, which do not need any :i386 
linux packages.
Debian 14 tricky will have Wine 11.0 or 12.0, so no :i386 packages needed any 
more, and i386 architecture any more.
However, gcc-multilib packages are still needed, because grub-pc depends on it, 
so these cannot be removed.