HPCC-11419 Clean up some //MORE comments

Comments were left in code to indicate further investigation required to
determine if the code was correct.

That investigation has been done - the code was correct in two cases and
unused in a third.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #6269 from richardkchapman/HPCC-11419

HPCC-11419 Clean up some //MORE comments

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>