HPCC-12455 Remove spurious serialization from getGlobalUniqueIds

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>
Merge pull request #6575 from jakesmith/hpcc-12455

HPCC-12455 Remove spurious serialization from getGlobalUniqueIds

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>