On svn-auth-x509 branch, comment fix, no functional change.

* subversion/libsvn_subr/x509parse.c
  (x509name_to_utf8_string): remove a sentence in a comment that no longer
    makes sense in the context of the code.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svn-auth-x509@1613667 13f79535-47bb-0310-9956-ffa450edef68