mkosi: Drop i686 packages

These are only needed for some kernel selftests but they prevent
building the mkosi image on aarch64 systems so let's drop them
until mkosi has support for conditional configuration so we can
only add these packages on the right architecture.

mkosi.conf.d/fedora/10-mkosi.fedora

@@ -18,7 +18,6 @@ Packages=
         fuse
         glib2
         glibc-minimal-langpack
-        glibc.i686
         gnutls
         iproute
         iproute-tc
@@ -46,9 +45,7 @@ BuildPackages=
         bpftool
         docbook-xsl
         dwarves
-        glibc-devel.i686
         glibc-static
-        glibc-static.i686
         gnu-efi-devel
         libcap-static
         pam-devel