Remove additional detection of `.egg` packages when using the `importlib.metadata` backend

[sbidoul]

pip has dropped support for installing .egg-based packages when it stopped invoking setup.py install.
At some point pip will abandon support for detecting and uninstalling legacy .egg-based packages too.

If you reach this issue from the pip deprecation message, it is likely that your Python environment has packages that have been installed with setup.py install, easy_install, or an older pip version.

The recommended action is to uninstall the package and reinstall it with a recent pip.

[sbidoul]

@hanivianka have you tried the recommended action mentioned in the top post of this page?

[tahayparker]

@sbidoul has pip 24.3 been released? im tired of seeing the bright message pop up on an otherwise dark screen

[sbidoul]

@tahayparker 24.3 is planned for October 2024.

It is important that affected users resolve the warning by applying the recommendation in the first post of this page.