Remove per-certificate chain handling code (obsoleted by
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=b9fa413a08d436d6b522749b5e808fcd931fd943)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1555463 13f79535-47bb-0310-9956-ffa450edef68