After remove some files not used, bootstrap.sh started to fail:
# ./bootstrap.sh
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal -I m4
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy
autoreconf: running: /usr/bin/autoconf
autoreconf: configure.ac: not using Autoheader
autoreconf: running: automake --add-missing --copy --no-force
Makefile.am: installing './INSTALL'
Makefile.am: error: required file './NEWS' not found
Makefile.am: error: required file './README' not found
Makefile.am: installing './COPYING' using GNU General Public License v3 file
Makefile.am: Consider adding the COPYING file to the version control system
Makefile.am: for your code, to avoid questions about which license your project uses
autoreconf: automake failed with exit status: 1
After remove some files not used, bootstrap.sh started to fail: