Revert "base: Use /var/home for home directories by default"

This reverts commit 83f1bab.

Author: cgwalters

fedora-coreos-base.yaml

@@ -57,9 +57,6 @@ postprocess:
     # Persistent journal by default
     echo 'Storage=persistent' >> /etc/systemd/journald.conf
 
-    # Fix /home to be /var/home - software wants to canonicalize this.
-    sed -i -e 's,^HOME=.*,HOME=/var/home,' /etc/default/useradd
-
     # https://github.com/openshift/os/issues/96
     # sudo group https://github.com/openshift/os/issues/96
     echo '%sudo        ALL=(ALL)       NOPASSWD: ALL' > /etc/sudoers.d/coreos-sudo-group