Revert "LiveText: pumped generator follow-up (#20216)" (#20472)
This reverts commit 9fe7dde9ab1b173d3c03f001bb2704121ac8ad7f.
### Reverts PR
Reverts #20216
### Issues fixed
N/A
### Issues reopened
N/A
### Reason for revert
Introduced hidden config params
### Can this PR be reimplemented? If so, what is required for the next
attempt
https://github.com/nvaccess/nvda/pull/20216#issuecomment-4851174961
