Do not install pre-generated manpages.

Also remove redundant autotools stages.

Early manpages in autoconf 2.52-2.59 are removed from output.
Later ones are regenerated with help2man.

Fixes #182

sysa/autoconf-2.61/autoconf-2.61.sh

@@ -3,8 +3,9 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 src_prepare() {
-    rm doc/standards.info
+    rm doc/standards.info man/*.1
     sed -i -e '/AC_PROG_GREP/d' -e '/AC_PROG_SED/d' configure.ac
+
     autoreconf-2.59 -f
 
     # Install autoconf data files into versioned directory

sysa/autoconf-2.61/stage2.sh

@@ -1,25 +0,0 @@
-# SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
-#
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-src_prepare() {
-    rm doc/standards.info
-    autoreconf-2.61 -f
-
-    # Install autoconf data files into versioned directory
-    for file in */*/Makefile.in */Makefile.in Makefile.in; do
-        sed -i '/^pkgdatadir/s:$:-@VERSION@:' "$file"
-    done
-}
-
-src_configure() {
-    ./configure --prefix="${PREFIX}" --program-suffix=-2.61
-}
-
-src_compile() {
-    make MAKEINFO=true
-}
-
-src_install() {
-    make install MAKEINFO=true DESTDIR="${DESTDIR}"
-}