[6.0] Remove call to 'toPunycode' which throws error for files with '_'

[MacJoom]

Pull Request for Issue #45484.

Summary of Changes

Remove call to 'toPunycode' in getSafeName which throws error for files with underscores

Testing Instructions

• Upload files with underscores in the name
• Upload all kind of files with weird filenames
  File should upload. Special chars should be changed in the uploaded filename

Actual result BEFORE applying this Pull Request

Nothing happens - see Issue

Expected result AFTER applying this Pull Request

File is uploaded

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[brianteeman]

this PR is not correct. Before this PR if you have a filename using ut8 characters it will be uploaded and cleaned
with this PR the file is simply not uploaded

Test by creating an image with the filename imageäöütest.jpg

Before this pr it will be saved as imageaoutest.jpg

With this pr nothing happens to the image

unrelated bug

[brianteeman]

I have tested this item 🔴 unsuccessfully on 48f40f8

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[brianteeman]

I have tested this item ✅ successfully on 48f40f8

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[exlemor]

I have tested this item ✅ successfully on 48f40f8

I have test this successfully with: imageäöütest.jpg, acs-delivering_package2_copy.jpg and imageäöütest_pack_test.jpg all were uploaded with appropriate substitution.

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[richard67]

RTC

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