- remove obsolete kiwi_fixedpackbootincludes from .profile env
  * this information was used in the functions basePackBootIncludes
    and baseUnpackBootIncludes to preserve boot included data from
    being removed by kiwi's initrd strip processing. With the new
    system based and the <strip> section and also documented in:
    http://doc.opensuse.org/projects/kiwi/doc/#sec.bootcustomization
    these functions became obsolete.