Undeprecate nargchk, but add note that narginchk is preferred. * func.txi: Use narginchk instead of nargchk in documentation example. * scripts/deprecated/nargchk.m: Remove deprecated version of nargchk. * scripts/deprecated/module.mk: Remove deprecated nargchk.m from build system. * scripts/general/nargchk.m: Add caution to docstring that this function may be removed in the future and that narginchk is preferred.

gnulib-hg = gnulib-hg