Clean up some style nits in skip_bom().
Clean up some style nits in skip_bom().

* subversion/libsvn_subr/config_file.c
  (skip_bom): Remove some unnecessary syntax that I thought I'd
    removed before committing r1499496.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1499498 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion