Review Deprecated Functions

[donyunardi]

Summary

Let's review the functions we deprecated in the previous release and decide whether to hard deprecate them (lifecycle::deprecate_stop) or remove them from the codebase entirely.

Function	Action
new_qenv	deprecate_stop

[llrs-roche]

On the history there are several PR about deprecate_soft (most of them recent) and deprecate_stop also fairly recent.
But it is not easy to know what happen after that (git log or git rev-list don't work well on deleted files).

I have prepared a PR that kept the function and help page but I have problems with the git configuration to create the branch/PR. Will resume on monday