Revert "Test for the scheduler hang on alg exceptions"

Unfortunately !979 (merged) triggers a failure in one LHCb test which I didn't spot earlier, so I have to revert it to be free to debug the actual problem without interfering with the normal LHCb development workflow.

This reverts merge request !979 (merged)

changed milestone to %v33r2

merged

mentioned in commit 878ee323

mentioned in merge request atlas/athena!35023 (merged)

mentioned in merge request !1107 (merged)