config: drop scripts that automake says are not independent These three scripts are too closely tied to automake internals to be independently useful. In fact, automake would rather that people did not mix the latest version of these scripts with older versions of automake, as there is no effort being put into maintaining backwards-compatibility when these scripts are updated. The remaining scripts pulled from automake, such as mdate-sh or depcomp, are independently useful, so a future patch may end up reparenting those scripts to have gnulib instead of automake as the master owner. * config/srclist.txt: Drop elisp-comp, missing, and ylwrap. * build-aux/elisp-comp: Delete. * build-aux/missing: Likewise. * build-aux/ylwrap: Likewise. * modules/elisp-comp: Likewise. * MODULES.html.sh: Drop mention of elisp-comp. * NEWS: Mention this. Signed-off-by: Eric Blake <eblake@redhat.com>