Remove non-English markdowns which have xliff versions

[SaschaCowley]

Link to issue number:

Closes #17237

Summary of the issue:

As translated markdown files are generated from xliff files for languages that have been moved to Crowdin, markdown files for these languages should not be under version control.

Description of user facing changes

None.

Description of development approach

Removed files listed in #17237.

Also used the following script to make sure nothing was missed:

Code snippet

import os.path
import glob
import subprocess

proc = subprocess.run("git diff head~1 --diff-filter=D --name-only", capture_output=True)
deleted_files = proc.stdout.decode().splitlines()

for file in deleted_files:
	xliff = f"{os.path.splitext(file)[0]}.xliff"
	assert os.path.isfile(xliff)

for file in glob.glob("user_docs/**/*.md"):
	if os.path.split(os.path.split(file)[0])[1] == 'en':
		continue
	xliff = f"{os.path.splitext(file)[0]}.xliff"
	assert not os.path.isfile(xliff)

Testing strategy:

Built locally and on AppVeyor.

Known issues with pull request:

This will need to be done as further languages are moved over from l10n to Crowdin.

Code Review Checklist:

• Documentation:
  • Change log entry
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• API is compatible with existing add-ons.
• Security precautions taken.

@coderabbitai summary

[wmhn1872265132]

BTW, as of a recent beta version, .md files were accidentally included in the installer