[subset] remove TODO that was already done

src/hb-subset-plan.hh

@@ -38,7 +38,6 @@ struct hb_subset_plan_t {
   // TODO(Q1) actual map, drop this crap
   // Look at me ma, I'm a poor mans map codepoint : new gid
   // codepoints is sorted and aligned with gids_to_retain.
-  // TODO Also you should init/fini those arrays
   hb_prealloced_array_t<hb_codepoint_t> codepoints;
   hb_prealloced_array_t<hb_codepoint_t> gids_to_retain;
   hb_prealloced_array_t<hb_codepoint_t> gids_to_retain_sorted;