remove old TODO comment

- remaining items are tracked in gitlab issues

darshan-runtime/lib/darshan-stdio.c

@@ -4,19 +4,6 @@
  *
  */
 
-/* TODO list (general) for this module:
- * - add stdio page to darshan-job-summary
- * - update darshan-parser to include stdio information in any relevant 
- *   performance estimate / summary modes
- * - figure out what to do about posix module compatibility
- *   - remove stdio counters in POSIX or keep and set to -1?
- *   - affected counters in posix module:
- *     - POSIX_FOPENS
- *     - POSIX_FREADS
- *     - POSIX_FWRITES
- *     - POSIX_FSEEKS
- */
-
 /* catalog of stdio functions instrumented by this module
  *
  * functions for opening streams