include/openssl/opensslconf.h.in: remove spurious HEADER_FILE_H definition
include/openssl/opensslconf.h.in: remove spurious HEADER_FILE_H definition

This macro was never defined in existing releases, there's no reason
for us to create a macro that we immediately deprecate.

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10364)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl