[C++] std::erase_if missing for some containers but not others.

[Icantjuddle]

Bug report

It seems that some versions of std::erase_if are not present despite them being in the upstream docs.

For example: https://en.cppreference.com/w/cpp/container/unordered_map/erase_if works but https://devdocs.io/cpp/container/unordered_map/erase_if results in page not found.

This seems similar to:
#2190
#2175

OS information

Running firefox 126.0 on MacOS 14.3.1 on a 13-inch M1 2020 model.

Steps to reproduce

Go to the above link.

[suryaanshah]

Hello, can I work on fixing these issues?