I understand what you are saying and there is a fuse to pull that disables the ABS system.
It should be safe to do. It will enable the amber warning light on the instrument panel which could get annoying. But without actually testing it there is no way to know for sure that the base braking system would still work.
Anyone willing to test this can simply pull the #3 fuse ENGINE BLOCK FUSE BOX. I am not sure yet what other items this controls. I will see what else I can find on this fuse.
Re-flashing the ECM might work but will the re-flashing of the ECM take care of the programming in the CAB?