Remove beets.mediafile deprecation warning

[semohr]

I propose we remove the deprecation warning for beets.mediafile. This warning was introduced in version 1.6.0.

While we could schedule the removal for version 3.0.0, it should be safe to remove it now since the feature has been deprecated for over three years.

ref: #4263

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR fully removes the long-deprecated beets.mediafile module by deleting its implementation file and cleans up the corresponding deprecation warning entry in the project changelog.

File-Level Changes

Change	Details	Files
Remove deprecated mediafile module	Deleted the beets/mediafile.py file	beets/mediafile.py
Clean up deprecation entry in changelog	Removed the beets.mediafile deprecation warning from docs/changelog.rst	docs/changelog.rst

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[Copilot]

Pull Request Overview

This PR removes the deprecated beets.mediafile module that has been showing a deprecation warning since version 1.6.0. The module was a compatibility shim that imported and re-exported everything from the mediafile module.

• Completely removes the beets/mediafile.py file
• Updates the changelog to document the removal for packagers

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
beets/mediafile.py	Complete removal of deprecated compatibility module
docs/changelog.rst	Documents the removal in changelog for packagers

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.54%. Comparing base (394d78d) to head (d46365f).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6016      +/-   ##
==========================================
+ Coverage   66.52%   66.54%   +0.02%     
==========================================
  Files         117      116       -1     
  Lines       18084    18077       -7     
  Branches     3061     3059       -2     
==========================================
  Hits        12030    12030              
+ Misses       5403     5396       -7     
  Partials      651      651              

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[JOJ0]

Yes! it's time! :-) Thanks!

[snejus]

We need a major version increase in order to remove it.

[semohr]

Added 3.0.0 as milestone. Might help us keep track of it.