It's not necessary any more, but it does seem to make the output file
smaller so it can stay for now.
/*
* Compare glyphs in a way that will put them in an order that
- * FontForge won't change. This should mean that our glyph IDs match
- * FontForge's, so that we can use them in tables that FontForge
- * doesn't understand.
+ * FontForge wouldn't change. We don't actually use FontForge any
+ * more, but this sorting still makes the OTF file a few K shorter.
*/
static int
compare_glyphs_by_ffid(const void *va, const void *vb)