Remove obsolete TODO item

src/hb-open-file-private.hh

@@ -147,8 +147,6 @@ struct TTCHeader
     TRACE_SANITIZE ();
     if (!SANITIZE (version)) return false;
     if (version.major < 1 || version.major > 2) return true;
-    /* TODO Maybe we shouldn't NEUTER these offsets, they may cause a full copy
-     * of the whole font right now. */
     return table.sanitize (SANITIZE_ARG, CONST_CHARP(this), CONST_CHARP(this));
   }