[4.0][com_content] Remove column-related code.

[SharkyKZ]

Pull Request for Issue # .

Summary of Changes

This removes remaining code related to column options in com_content. See #18319 and #22840 for details.

Testing Instructions

Code review.

[infograf768]

NOTE

To @wilsonge @laoneo @Bakual @mbabker @rdeutz
Concerning installation/src/Model/LanguagesModel.php, what do we do with the methods which have allowed to install a basic multilingual site at installation time in 3.x as it looks like it has been apparently officially decided to drop this functionality in 4.0 in favor of the multilang sample data plugin.

I still question this decision btw. And it looks like I am not alone on this.

[Bakual]

Can you ask this question in a separate issue? It's quite offtopic here as this PR is completely unrelated to that question.

[infograf768]

I asked it here as the file has been modified and the methods may have to be totally deleted if the decision is confirmed. Just a Note to admins.

[Bakual]

Still needs an own issue to be properly discussed so it doesn't derail this valid PR here.

[infograf768]

sure

[Quy]

Remove these two strings?

[SharkyKZ]

Removed.

[infograf768]

Not sure we should delete these strings as they may be used by 3pd.

[brianteeman]

Personally I would not remove the language strings from the global language file. When I removed all unused strings earlier I left the ones in global files as those are the files recommended for extensions to utilise and I felt it was an unnecessary additional change they would have to make. My 2c

[Quy]

I have tested this item ✅ successfully on 62d7cb1

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[wilsonge]

@zero-24 @SniperSister RIPS please

[zero-24]

Fixed rips sorry that it took that long @wilsonge

[wilsonge]

@zero-24 doesn't seem to have worked? Or there's a new issue :( No worries about the time

[wilsonge]

Thanks!