build: Drop the unused cp437.py script
build: Drop the unused cp437.py script

https://bugzilla.gnome.org/show_bug.cgi?id=765301

thestinger/vte-ng,thestinger/vte-ng,thestinger/vte-ng,saitoha/vte-sixel,saitoha/vte-sixel,saitoha/vte-sixel