gprofng: remove dependency on help2man

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.
6 files changed