[4.2] PHP8.2 Remove the not used method assignment in mm API

[laoneo]

Summary of Changes

Removes the not used method variable in the media manager APIController.

Testing Instructions

Open the media manager on PHP 8.2

Actual result BEFORE applying this Pull Request

Media data is not loaded.

Expected result AFTER applying this Pull Request

Media data is loaded.

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

[carlitorweb]

@laoneo still the data not loading. But also is giving a js error

Uncaught SyntaxError: Unexpected token '<', "<br />
<b>"... is not valid JSON
    at JSON.parse (<anonymous>)
    at onSuccess (media-manager.js?c9d04fea6dae2c821fd73c99da6c9835:8113:45)
    at xhr.onreadystatechange (core.js?c9d04fea6dae2c821fd73c99da6c9835:669:23)

[with 8.2 only]

[laoneo]

In the browser tools can you inspect the XHR request, what for a error message is displayed in the response?

[carlitorweb]

Sorry, forgot that:

<b>Deprecated</b>: Using ${var} in strings is deprecated, use {$var} instead in <b>www\bugtesting\joomla-cms\libraries\vendor\voku\portable-utf8\src\voku\helper\UTF8.php</b> on line <b>13409</b>

[carlitorweb]

But I confirm the error of the not used method variable and the patch fix it. The other error is not relate with this one

[carlitorweb]

I have tested this item ✅ successfully on d0c53b7

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[joomdonation]

I have tested this item ✅ successfully on d0c53b7

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[joomdonation]

RTC

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[roland-d]

Thank you