profiles: drop hardened/linux/{amd64,x86,ia64} profiles

profiles: drop hardened/linux/{amd64,x86,ia64} profiles

The following profiles are removed in favour of 17.0
substitute:
    hardened/linux/amd64
    hardened/linux/amd64/no-multilib
    hardened/linux/amd64/no-multilib/selinux
    hardened/linux/amd64/selinux
    hardened/linux/amd64/x32

    hardened/linux/ia64

    hardened/linux/x86
    hardened/linux/x86/selinux

The profiles are deprecated for 6+ months, are not
referred from profiles.desc and refer to deleted
releases/13.0 base.

Bug: https://bugs.gentoo.org/672960
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>