cleanup: remove almost-unused global var 'am_relative_dir' Cherry picked from commit v1.12.2-741-g53b5d11 of Automake-NG. * automake.in ($am_relative_dir): Delete, it was only used once ... (generate_makefile): ... in here, so it's simpler to inline its expansion. (initialize_per_input): Don't reset the deleted variable. Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>