[5.3] Remove un-used imports

[joomdonation]

Pull Request for Issue # .

Summary of Changes

Tiny PR to remove un-used import and sort namespace in our import statement. This is done automatically by PHPStorm optimize import function.

Testing Instructions

Code review

Actual result BEFORE applying this Pull Request

Works

Expected result AFTER applying this Pull Request

Works

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

[alikon]

I have tested this item ✅ successfully on e4d9bbe

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[viocassel]

I have tested this item ✅ successfully on e4d9bbe

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45042.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45042.}