gh-105687: Remove deprecated objects from `re` module by sobolevn · Pull Request #105688 · python/cpython

I already proposed to remove these APIs directly, without deprecation period. But @serhiy-storchaka wanted to collect feedback of users with a deprecation period.

Actually, I initially removed it without deprecation, because it clearly looked to me as unfinished in process of initial implementation and later broken feature.

My best guess is that it was purposed to make all quntifiers possessive. But initial implementation of atomic groups and possessive quantifiers was broken. Now we have working implementation, and can enable that feature. To disable backtracking it would need also wrap every alternation into atomic group. We can do this now if it was initial purpose, but I have no idea why somebody would need such feature.