help2man is no longer used to create the gprofng man pages.
gprofng/ChangeLog
2023-10-31 Vladimir Mezentsev <vladimir.mezentsev@oracle.com>
* configure.ac: Remove HELP2MAN.
* Makefile.in: Rebuild.
* configure: Rebuild.
* doc/Makefile.in: Rebuild.
* gp-display-html/Makefile.in: Rebuild.
* src/Makefile.in: Rebuild.