gen_display_resources: silence 'missing character' message

Since we made the decision to allow translations which do not have coverage in
the terminal font, these routinely occur and are expected.  The message is
unhelpful and due to their voume make it harder to find relevant information
particularly in github actions results.

tools/gen_display_resources.py

@@ -61,7 +61,6 @@ f.load_glyphs(set(ord(c) for c in all_characters))
 # Get each glyph.
 for c in set(all_characters):
     if ord(c) not in f._glyphs:
-        print("Font missing character:", c, ord(c))
         filtered_characters = filtered_characters.replace(c, "")
         continue
     g = f.get_glyph(ord(c))