Remove OpenRSP callback matrix/file writes in debug mode

OpenRSP-related callback routines would previously write results (matrices and other information) to disk if built and run in debug move. This MR removes these writes and removes a warning about them in the manual.

Tested: Built locally in debug and release mode: All tests labeled 'openrsp' passed. Also tested for one property separately to see if files remain: Now the same files are written for that property both when built in debug mode and in release mode.

For @bingao to review: Please also check if any such writes remain: I think I got all of them but you wrote them and know best.